diff --git a/bin/xbps-rindex/sign.c b/bin/xbps-rindex/sign.c
index 4acb203b..d362f3e2 100644
--- a/bin/xbps-rindex/sign.c
+++ b/bin/xbps-rindex/sign.c
@@ -150,7 +150,7 @@ sign_repo(struct xbps_handle *xhp, const char *repodir,
 	xbps_dictionary_t meta = NULL;
 	xbps_data_t data = NULL, rpubkey = NULL;
 	RSA *rsa = NULL;
-	uint16_t rpubkeysize, pubkeysize;
+	uint16_t rpubkeysize = 0, pubkeysize = 0;
 	const char *rsignedby = NULL;
 	char *buf = NULL;
 	int lockfd = -1;