diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index 44c7c9ee82..f1c5d079f9 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -630,8 +630,6 @@ static void prepare_push_cert_sha1(struct child_process *proc)
 		return;
 
 	if (!already_done) {
-		struct strbuf gpg_output = STRBUF_INIT;
-		struct strbuf gpg_status = STRBUF_INIT;
 		int bogs /* beginning_of_gpg_sig */;
 
 		already_done = 1;
@@ -640,22 +638,11 @@ static void prepare_push_cert_sha1(struct child_process *proc)
 			oidclr(&push_cert_oid);
 
 		memset(&sigcheck, '\0', sizeof(sigcheck));
-		sigcheck.result = 'N';
 
 		bogs = parse_signature(push_cert.buf, push_cert.len);
-		if (verify_signed_buffer(push_cert.buf, bogs,
-					 push_cert.buf + bogs, push_cert.len - bogs,
-					 &gpg_output, &gpg_status) < 0) {
-			; /* error running gpg */
-		} else {
-			sigcheck.payload = push_cert.buf;
-			sigcheck.gpg_output = gpg_output.buf;
-			sigcheck.gpg_status = gpg_status.buf;
-			parse_gpg_output(&sigcheck);
-		}
+		check_signature(push_cert.buf, bogs, push_cert.buf + bogs,
+				push_cert.len - bogs, &sigcheck);
 
-		strbuf_release(&gpg_output);
-		strbuf_release(&gpg_status);
 		nonce_status = check_nonce(push_cert.buf, bogs);
 	}
 	if (!is_null_oid(&push_cert_oid)) {
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