--- ./src/ngircd/defines.h.orig
+++ ./src/ngircd/defines.h
@@ -96,7 +96,7 @@
 #define CLIENT_PASS_LEN 21
 
 /** Max. length of user name ("login"; incl. NULL), RFC 2812, section 1.2.1. */
-#define CLIENT_USER_LEN 10
+#define CLIENT_USER_LEN 64
 
 /** Max. length of "real names" (including NULL). */
 #define CLIENT_NAME_LEN 32
