diff --git a/cache.h b/cache.h
index c0072d43b1..e986cf4ea9 100644
--- a/cache.h
+++ b/cache.h
@@ -1960,7 +1960,6 @@ int stat_validity_check(struct stat_validity *sv, const char *path);
 void stat_validity_update(struct stat_validity *sv, int fd);
 
 int versioncmp(const char *s1, const char *s2);
-void sleep_millisec(int millisec);
 
 /*
  * Create a directory and (if share is nonzero) adjust its permissions
diff --git a/git-compat-util.h b/git-compat-util.h
index adfea06897..7d509c5022 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -1354,4 +1354,6 @@ static inline void *container_of_or_null_offset(void *ptr, size_t offset)
 	((uintptr_t)&(ptr)->member - (uintptr_t)(ptr))
 #endif /* !__GNUC__ */
 
+void sleep_millisec(int millisec);
+
 #endif