diff --git a/common.h b/common.h
index d312a45c..c9cd55ca 100644
--- a/common.h
+++ b/common.h
@@ -8,7 +8,7 @@
 typedef struct {
     char *password;
     char *apname;
-    char hw_addr[6];
+    uint8_t hw_addr[6];
     int port;
     char *output_name;
     audio_output *output;