diff --git a/miniupnpc/miniupnpc.c b/miniupnpc/miniupnpc.c
index 044e044..b4a6b2a 100644
--- a/miniupnpc/miniupnpc.c
+++ b/miniupnpc/miniupnpc.c
@@ -533,6 +533,10 @@ upnpDiscoverDevices(const char * const deviceTypes[],
 		*error = UPNPDISCOVER_SUCCESS;
 	/* Calculating maximum response time in seconds */
 	mx = ((unsigned int)delay) / 1000u;
+	if(mx == 0) {
+		mx = 1;
+		delay = 1000;
+	}
 	/* receiving SSDP response packet */
 	for(deviceIndex = 0; deviceTypes[deviceIndex]; deviceIndex++) {
 		/* sending the SSDP M-SEARCH packet */