diff --git a/Makefile b/Makefile
index 65b5b8a63f..7b310859e9 100644
--- a/Makefile
+++ b/Makefile
@@ -126,6 +126,9 @@ all::
 # randomly break unless your underlying filesystem supports those sub-second
 # times (my ext3 doesn't).
 #
+# Define USE_ST_TIMESPEC if your "struct stat" uses "st_ctimespec" instead of
+# "st_ctim"
+#
 # Define NO_NSEC if your "struct stat" does not have "st_ctim.tv_nsec"
 # available.  This automatically turns USE_NSEC off.
 #
@@ -663,6 +666,7 @@ ifeq ($(uname_S),Darwin)
 	endif
 	NO_MEMMEM = YesPlease
 	THREADED_DELTA_SEARCH = YesPlease
+	USE_ST_TIMESPEC = YesPlease
 endif
 ifeq ($(uname_S),SunOS)
 	NEEDS_SOCKET = YesPlease
@@ -928,6 +932,9 @@ endif
 ifdef NO_ST_BLOCKS_IN_STRUCT_STAT
 	BASIC_CFLAGS += -DNO_ST_BLOCKS_IN_STRUCT_STAT
 endif
+ifdef USE_ST_TIMESPEC
+	BASIC_CFLAGS += -DUSE_ST_TIMESPEC
+endif
 ifdef NO_NSEC
 	BASIC_CFLAGS += -DNO_NSEC
 endif
diff --git a/git-compat-util.h b/git-compat-util.h
index 9b495dcad8..c915752a24 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -389,8 +389,13 @@ void git_qsort(void *base, size_t nmemb, size_t size,
 #define ST_CTIME_NSEC(st) 0
 #define ST_MTIME_NSEC(st) 0
 #else
+#ifdef USE_ST_TIMESPEC
+#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
+#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
+#else
 #define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
 #define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
 #endif
+#endif
 
 #endif