diff --git a/gpg-interface.c b/gpg-interface.c
index 0647bd6348..09ddfbc267 100644
--- a/gpg-interface.c
+++ b/gpg-interface.c
@@ -35,7 +35,7 @@ static struct {
 	{ 'R', "\n[GNUPG:] REVKEYSIG "},
 };
 
-void parse_gpg_output(struct signature_check *sigc)
+static void parse_gpg_output(struct signature_check *sigc)
 {
 	const char *buf = sigc->gpg_status;
 	int i;
diff --git a/gpg-interface.h b/gpg-interface.h
index a5e6517ae6..5ecff4aa0c 100644
--- a/gpg-interface.h
+++ b/gpg-interface.h
@@ -33,8 +33,6 @@ void signature_check_clear(struct signature_check *sigc);
  */
 size_t parse_signature(const char *buf, size_t size);
 
-void parse_gpg_output(struct signature_check *);
-
 /*
  * Create a detached signature for the contents of "buffer" and append
  * it after "signature"; "buffer" and "signature" can be the same