diff --git a/rerere.c b/rerere.c
index b57a34daa7..a6a5cd57be 100644
--- a/rerere.c
+++ b/rerere.c
@@ -25,7 +25,7 @@ const char *rerere_path(const char *hex, const char *file)
 	return git_path("rr-cache/%s/%s", hex, file);
 }
 
-int has_rerere_resolution(const char *hex)
+static int has_rerere_resolution(const char *hex)
 {
 	struct stat st;
 	return !stat(rerere_path(hex, "postimage"), &st);
diff --git a/rerere.h b/rerere.h
index fcd8bc10ba..156d2aad80 100644
--- a/rerere.h
+++ b/rerere.h
@@ -16,7 +16,6 @@ extern void *RERERE_RESOLVED;
 extern int setup_rerere(struct string_list *, int);
 extern int rerere(int);
 extern const char *rerere_path(const char *hex, const char *file);
-extern int has_rerere_resolution(const char *hex);
 extern int rerere_forget(const char **);
 extern int rerere_remaining(struct string_list *);
 extern void rerere_clear(struct string_list *);