diff --git a/library/L3_Templates.ttcn b/library/L3_Templates.ttcn
index a2fe67a..6af020b 100644
--- a/library/L3_Templates.ttcn
+++ b/library/L3_Templates.ttcn
@@ -2779,7 +2779,7 @@
 }
 
 function f_gen_imei(integer suffix) return hexstring {
-	return f_concat_pad(15, '49999'H, suffix);
+	return f_concat_pad(14, '49999'H, suffix);
 }
 
 function f_gen_imsi(integer suffix) return hexstring {