diff --git a/crypto/pem/pem_lib.c b/crypto/pem/pem_lib.c
index c32044cf70..7066e67b39 100644
--- a/crypto/pem/pem_lib.c
+++ b/crypto/pem/pem_lib.c
@@ -368,8 +368,11 @@ err:
 	memset(iv,0,sizeof(iv));
 	memset((char *)&ctx,0,sizeof(ctx));
 	memset(buf,0,PEM_BUFSIZE);
-	memset(data,0,(unsigned int)dsize);
-	OPENSSL_free(data);
+	if (data != NULL)
+		{
+		memset(data,0,(unsigned int)dsize);
+		OPENSSL_free(data);
+		}
 	return(ret);
 	}