diff --git a/crypto/rsa/rsa_pmeth.c b/crypto/rsa/rsa_pmeth.c
index 9f4a2ca33..6d21b50d6 100644
--- a/crypto/rsa/rsa_pmeth.c
+++ b/crypto/rsa/rsa_pmeth.c
@@ -305,7 +305,7 @@ static int pkey_rsa_verify(EVP_PKEY_CTX *ctx,
 			return -1;
 		rslen = RSA_public_decrypt(siglen, sig, rctx->tbuf,
 						rsa, rctx->pad_mode);
-		if (rslen <= 0)
+		if (rslen == 0)
 			return 0;
 		}