diff --git a/Makefile b/Makefile
index f83b796831..88730d6fdd 100644
--- a/Makefile
+++ b/Makefile
@@ -818,7 +818,7 @@ LIB_OBJS += ewah/bitmap.o
 LIB_OBJS += ewah/ewah_bitmap.o
 LIB_OBJS += ewah/ewah_io.o
 LIB_OBJS += ewah/ewah_rlw.o
-LIB_OBJS += exec_cmd.o
+LIB_OBJS += exec-cmd.o
 LIB_OBJS += fetch-object.o
 LIB_OBJS += fetch-pack.o
 LIB_OBJS += fsck.o
@@ -2155,8 +2155,8 @@ else
 $(OBJECTS): $(LIB_H)
 endif
 
-exec_cmd.sp exec_cmd.s exec_cmd.o: GIT-PREFIX
-exec_cmd.sp exec_cmd.s exec_cmd.o: EXTRA_CPPFLAGS = \
+exec-cmd.sp exec-cmd.s exec-cmd.o: GIT-PREFIX
+exec-cmd.sp exec-cmd.s exec-cmd.o: EXTRA_CPPFLAGS = \
 	'-DGIT_EXEC_PATH="$(gitexecdir_SQ)"' \
 	'-DBINDIR="$(bindir_relative_SQ)"' \
 	'-DPREFIX="$(prefix_SQ)"'
diff --git a/attr.c b/attr.c
index dfc3a558d8..03a678fa9b 100644
--- a/attr.c
+++ b/attr.c
@@ -10,7 +10,7 @@
 #define NO_THE_INDEX_COMPATIBILITY_MACROS
 #include "cache.h"
 #include "config.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "attr.h"
 #include "dir.h"
 #include "utf8.h"
diff --git a/builtin/add.c b/builtin/add.c
index 9ef7fb02d5..c9e2619a9a 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -9,7 +9,7 @@
 #include "lockfile.h"
 #include "dir.h"
 #include "pathspec.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "cache-tree.h"
 #include "run-command.h"
 #include "parse-options.h"
diff --git a/builtin/am.c b/builtin/am.c
index 9c82603f70..d834f9e62b 100644
--- a/builtin/am.c
+++ b/builtin/am.c
@@ -6,7 +6,7 @@
 #include "cache.h"
 #include "config.h"
 #include "builtin.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "parse-options.h"
 #include "dir.h"
 #include "run-command.h"
diff --git a/builtin/describe.c b/builtin/describe.c
index de840f96a4..b5afc45846 100644
--- a/builtin/describe.c
+++ b/builtin/describe.c
@@ -6,7 +6,7 @@
 #include "blob.h"
 #include "refs.h"
 #include "builtin.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "parse-options.h"
 #include "revision.h"
 #include "diff.h"
diff --git a/builtin/difftool.c b/builtin/difftool.c
index ee8dce019e..aad0e073ee 100644
--- a/builtin/difftool.c
+++ b/builtin/difftool.c
@@ -15,7 +15,7 @@
 #include "config.h"
 #include "builtin.h"
 #include "run-command.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "parse-options.h"
 #include "argv-array.h"
 #include "strbuf.h"
diff --git a/builtin/hash-object.c b/builtin/hash-object.c
index 526da5c185..a9a3a198c3 100644
--- a/builtin/hash-object.c
+++ b/builtin/hash-object.c
@@ -9,7 +9,7 @@
 #include "blob.h"
 #include "quote.h"
 #include "parse-options.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 
 /*
  * This is to create corrupt objects for debugging and as such it
diff --git a/builtin/help.c b/builtin/help.c
index 598867cfea..2d51071429 100644
--- a/builtin/help.c
+++ b/builtin/help.c
@@ -4,7 +4,7 @@
 #include "cache.h"
 #include "config.h"
 #include "builtin.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "parse-options.h"
 #include "run-command.h"
 #include "column.h"
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index d81473e722..7700907f1b 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -9,7 +9,7 @@
 #include "tree.h"
 #include "progress.h"
 #include "fsck.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "streaming.h"
 #include "thread-utils.h"
 #include "packfile.h"
diff --git a/builtin/init-db.c b/builtin/init-db.c
index 68ff4ad75a..2542c5244e 100644
--- a/builtin/init-db.c
+++ b/builtin/init-db.c
@@ -7,7 +7,7 @@
 #include "config.h"
 #include "refs.h"
 #include "builtin.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "parse-options.h"
 
 #ifndef DEFAULT_GIT_TEMPLATE_DIR
diff --git a/builtin/merge-tree.c b/builtin/merge-tree.c
index 32736e0b10..bf01e05808 100644
--- a/builtin/merge-tree.c
+++ b/builtin/merge-tree.c
@@ -2,7 +2,7 @@
 #include "tree-walk.h"
 #include "xdiff-interface.h"
 #include "blob.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "merge-blobs.h"
 
 static const char merge_tree_usage[] = "git merge-tree <base-tree> <branch1> <branch2>";
diff --git a/builtin/notes.c b/builtin/notes.c
index 921e08d5bf..e5bf80eef1 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -14,7 +14,7 @@
 #include "blob.h"
 #include "pretty.h"
 #include "refs.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "run-command.h"
 #include "parse-options.h"
 #include "string-list.h"
diff --git a/builtin/pull.c b/builtin/pull.c
index e32d6cd5b4..71aac5005e 100644
--- a/builtin/pull.c
+++ b/builtin/pull.c
@@ -9,7 +9,7 @@
 #include "config.h"
 #include "builtin.h"
 #include "parse-options.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "run-command.h"
 #include "sha1-array.h"
 #include "remote.h"
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index c4272fbc96..4b68a28e92 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -7,7 +7,7 @@
 #include "pkt-line.h"
 #include "sideband.h"
 #include "run-command.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "commit.h"
 #include "object.h"
 #include "remote.h"
diff --git a/common-main.c b/common-main.c
index 7d716d5a54..b989e136b5 100644
--- a/common-main.c
+++ b/common-main.c
@@ -1,5 +1,5 @@
 #include "cache.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "attr.h"
 
 /*
diff --git a/config.c b/config.c
index c698988f5e..e2b87b4764 100644
--- a/config.c
+++ b/config.c
@@ -9,7 +9,7 @@
 #include "config.h"
 #include "repository.h"
 #include "lockfile.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "strbuf.h"
 #include "quote.h"
 #include "hashmap.h"
diff --git a/exec_cmd.c b/exec-cmd.c
similarity index 99%
rename from exec_cmd.c
rename to exec-cmd.c
index ce192a2d64..8a8261746a 100644
--- a/exec_cmd.c
+++ b/exec-cmd.c
@@ -1,5 +1,5 @@
 #include "cache.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "quote.h"
 #include "argv-array.h"
 #define MAX_ARGS	32
diff --git a/exec_cmd.h b/exec-cmd.h
similarity index 100%
rename from exec_cmd.h
rename to exec-cmd.h
diff --git a/fetch-pack.c b/fetch-pack.c
index adc1b68dd3..4a8bad8487 100644
--- a/fetch-pack.c
+++ b/fetch-pack.c
@@ -6,7 +6,7 @@
 #include "pkt-line.h"
 #include "commit.h"
 #include "tag.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "pack.h"
 #include "sideband.h"
 #include "fetch-pack.h"
diff --git a/git.c b/git.c
index 3a89893712..f598fae7b7 100644
--- a/git.c
+++ b/git.c
@@ -1,6 +1,6 @@
 #include "builtin.h"
 #include "config.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "help.h"
 #include "run-command.h"
 
diff --git a/help.c b/help.c
index 60071a9bea..a4feef2ffe 100644
--- a/help.c
+++ b/help.c
@@ -1,7 +1,7 @@
 #include "cache.h"
 #include "config.h"
 #include "builtin.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "run-command.h"
 #include "levenshtein.h"
 #include "help.h"
diff --git a/http-backend.c b/http-backend.c
index 88d2a9bc40..cc16cd04ad 100644
--- a/http-backend.c
+++ b/http-backend.c
@@ -5,7 +5,7 @@
 #include "pkt-line.h"
 #include "object.h"
 #include "tag.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "run-command.h"
 #include "string-list.h"
 #include "url.h"
diff --git a/http-fetch.c b/http-fetch.c
index 8af380050c..885e471501 100644
--- a/http-fetch.c
+++ b/http-fetch.c
@@ -1,6 +1,6 @@
 #include "cache.h"
 #include "config.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "http.h"
 #include "walker.h"
 
diff --git a/http-push.c b/http-push.c
index c0998fd763..f308ce0195 100644
--- a/http-push.c
+++ b/http-push.c
@@ -6,7 +6,7 @@
 #include "refs.h"
 #include "diff.h"
 #include "revision.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "remote.h"
 #include "list-objects.h"
 #include "sigchain.h"
diff --git a/imap-send.c b/imap-send.c
index ffb0a6eca8..3573cbfb0f 100644
--- a/imap-send.c
+++ b/imap-send.c
@@ -24,7 +24,7 @@
 #include "cache.h"
 #include "config.h"
 #include "credential.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "run-command.h"
 #include "parse-options.h"
 #ifdef NO_OPENSSL
diff --git a/remote-curl.c b/remote-curl.c
index a7c4c9b5ff..8d2ffaf8de 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -4,7 +4,7 @@
 #include "strbuf.h"
 #include "walker.h"
 #include "http.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "run-command.h"
 #include "pkt-line.h"
 #include "string-list.h"
diff --git a/remote-testsvn.c b/remote-testsvn.c
index c4bb9a8ba9..444d98059f 100644
--- a/remote-testsvn.c
+++ b/remote-testsvn.c
@@ -3,7 +3,7 @@
 #include "remote.h"
 #include "strbuf.h"
 #include "url.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "run-command.h"
 #include "vcs-svn/svndump.h"
 #include "notes.h"
diff --git a/run-command.c b/run-command.c
index 84899e423f..12c94c1dbe 100644
--- a/run-command.c
+++ b/run-command.c
@@ -1,6 +1,6 @@
 #include "cache.h"
 #include "run-command.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "sigchain.h"
 #include "argv-array.h"
 #include "thread-utils.h"
diff --git a/sequencer.c b/sequencer.c
index 667f35ebdf..6d631d25c6 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -7,7 +7,7 @@
 #include "sequencer.h"
 #include "tag.h"
 #include "run-command.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "utf8.h"
 #include "cache-tree.h"
 #include "diff.h"
diff --git a/shell.c b/shell.c
index 234b2d4f16..0200d10796 100644
--- a/shell.c
+++ b/shell.c
@@ -1,6 +1,6 @@
 #include "cache.h"
 #include "quote.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "strbuf.h"
 #include "run-command.h"
 
diff --git a/upload-pack.c b/upload-pack.c
index 4a82602be5..6261d4fab3 100644
--- a/upload-pack.c
+++ b/upload-pack.c
@@ -6,7 +6,7 @@
 #include "tag.h"
 #include "object.h"
 #include "commit.h"
-#include "exec_cmd.h"
+#include "exec-cmd.h"
 #include "diff.h"
 #include "revision.h"
 #include "list-objects.h"