diff --git a/lib/afp_url.c b/lib/afp_url.c
index 0cfc27d..6d4f693 100644
--- a/lib/afp_url.c
+++ b/lib/afp_url.c
@@ -33,12 +33,7 @@ static int check_port(char * port)
 
 static int check_uamname(const char * uam) 
 {
-	char * p;
-	for (p=(char *)uam;*p;p++) {
-		if (*p==' ') continue;
-		if ((*p<'A') || (*p>'z')) return -1;
-	}
-	return 0;
+	return !uam_string_to_bitmap(uam);
 }
 
 static int check_username(const char * user)