diff --git a/src/led.c b/src/led.c
index 3c9f36d..5c67dd6 100644
--- a/src/led.c
+++ b/src/led.c
@@ -21,7 +21,7 @@ void ledInit(config_t *pCfg) {
   if (! config_lookup_string(pCfg, LED_KEY, &ledsActiveStr)) {
     ledsActiveStr = DEFAULT_LED;
   }
-  ledsActive = (! strcasecmp(ledsActiveStr, "on")) || (! strcasecmp(ledsActiveStr, "true"));
+  ledsActive = (0 == strcasecmp(ledsActiveStr, "on")) || (0 == strcasecmp(ledsActiveStr, "true"));
   logmsg(LOG_INFO, "CONFIG: ledsActive=%d, ledsActiveStr=%s\n", ledsActiveStr, ledsActive);
 
   pinMode(GREEN_OUT, OUTPUT);