diff --git a/Documentation/technical/api-object-access.txt b/Documentation/technical/api-object-access.txt
index a1162e5bcd..5b29622d00 100644
--- a/Documentation/technical/api-object-access.txt
+++ b/Documentation/technical/api-object-access.txt
@@ -1,7 +1,7 @@
 object access API
 =================
 
-Talk about <sha1_file.c> and <object.h> family, things like
+Talk about <sha1-file.c> and <object.h> family, things like
 
 * read_sha1_file()
 * read_object_with_reference()
diff --git a/Makefile b/Makefile
index ed0ac30a16..ce26efa7dc 100644
--- a/Makefile
+++ b/Makefile
@@ -900,7 +900,7 @@ LIB_OBJS += server-info.o
 LIB_OBJS += setup.o
 LIB_OBJS += sha1-array.o
 LIB_OBJS += sha1-lookup.o
-LIB_OBJS += sha1_file.o
+LIB_OBJS += sha1-file.o
 LIB_OBJS += sha1-name.o
 LIB_OBJS += shallow.o
 LIB_OBJS += sideband.o
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 7700907f1b..78e66b9986 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -1593,7 +1593,7 @@ static void read_idx_option(struct pack_idx_option *opts, const char *pack_name)
 	/*
 	 * Get rid of the idx file as we do not need it anymore.
 	 * NEEDSWORK: extract this bit from free_pack_by_name() in
-	 * sha1_file.c, perhaps?  It shouldn't matter very much as we
+	 * sha1-file.c, perhaps?  It shouldn't matter very much as we
 	 * know we haven't installed this pack (hence we never have
 	 * read anything from it).
 	 */
diff --git a/sha1_file.c b/sha1-file.c
similarity index 100%
rename from sha1_file.c
rename to sha1-file.c