diff --git a/main.c b/main.c
index 96c9154..8c61085 100644
--- a/main.c
+++ b/main.c
@@ -284,10 +284,14 @@ int main(int argc, char **argv) {
 			{
 				int byte = 0;
 				char *tmp;
-				char *t = strtok(optarg, ":");
-				while (t && byte < 6) {
-					mac[byte++] = (u8_t)strtoul(t, &tmp, 16);
-					t = strtok(NULL, ":");
+				if (!strncmp(optarg, "00:04:20", 8)) {
+					LOG_ERROR("ignoring mac address from hardware player range 00:04:20:**:**:**");
+				} else {
+					char *t = strtok(optarg, ":");
+					while (t && byte < 6) {
+						mac[byte++] = (u8_t)strtoul(t, &tmp, 16);
+						t = strtok(NULL, ":");
+					}
 				}
 			}
 			break;
diff --git a/squeezelite.h b/squeezelite.h
index c331415..bdf5e89 100644
--- a/squeezelite.h
+++ b/squeezelite.h
@@ -20,7 +20,7 @@
 
 // make may define: PORTAUDIO, SELFPIPE, RESAMPLE, RESAMPLE_MP, VISEXPORT, DSD, LINKALL to influence build
 
-#define VERSION "v1.6.4"
+#define VERSION "v1.6.5"
 
 // build detection
 #if defined(linux)