diff --git a/probe.c b/probe.c
index 79659e9..cf7711f 100644
--- a/probe.c
+++ b/probe.c
@@ -229,7 +229,7 @@ static int regex_probe(const char *p, int len, struct proto *proto)
     for (; *probe && regexec(*probe, p, 0, &pos, REG_STARTEND); probe++)
         /* try them all */;
 
-    return (probe != NULL);
+    return (*probe != NULL);
 }
 
 /*