Index: uspace/app/wifi_supplicant/wifi_supplicant.c
===================================================================
--- uspace/app/wifi_supplicant/wifi_supplicant.c	(revision d4643dbae27d9472d0fecc6a9556bb91b67fa4c0)
+++ uspace/app/wifi_supplicant/wifi_supplicant.c	(revision 71b4444cd56da7664761b6fd0997b0d3b2cbd9db)
@@ -75,15 +75,9 @@
 }
 
-static char *nic_addr_format(nic_address_t *addr)
-{
-	char *str;
-	int rc = asprintf(&str, "%02x:%02x:%02x:%02x:%02x:%02x",
+static void nic_addr_format(nic_address_t *addr, char *out, size_t out_size)
+{
+	snprintf(out, out_size, "%02x:%02x:%02x:%02x:%02x:%02x",
 	    addr->address[0], addr->address[1], addr->address[2],
 	    addr->address[3], addr->address[4], addr->address[5]);
-
-	if (rc < 0)
-		return NULL;
-
-	return str;
 }
 
@@ -263,7 +257,9 @@
 	for (uint8_t i = 0; i < scan_results.length; i++) {
 		ieee80211_scan_result_t result = scan_results.results[i];
+		char mac_addr_hex[18];
+		nic_addr_format(&result.bssid, mac_addr_hex, 18);
 
 		printf("%16.16s %17s %4d %5s %5s %7s %7s\n",
-		    result.ssid, nic_addr_format(&result.bssid),
+		    result.ssid, mac_addr_hex,
 		    result.channel,
 		    enum_name(ieee80211_security_type_strs, result.security.type),