diff --git a/util/ldb_cmd.h b/util/ldb_cmd.h
index 12b5c4a52..bb47b919d 100644
--- a/util/ldb_cmd.h
+++ b/util/ldb_cmd.h
@@ -99,7 +99,7 @@ public:
 
   static string HexToString(const string& str) {
     string parsed;
-    if (str[0] == '0' && str[1] == 'x') {
+    if (str[0] != '0' || str[1] != 'x') {
       fprintf(stderr, "Invalid hex input %s.  Must start with 0x\n",
               str.c_str());
       throw "Invalid hex input";