diff --git a/library/L3_Templates.ttcn b/library/L3_Templates.ttcn
index db514a410..c603b7ba3 100644
--- a/library/L3_Templates.ttcn
+++ b/library/L3_Templates.ttcn
@@ -47,10 +47,10 @@ private function f_enc_IMSI_L3(hexstring digits) return IMSI_L3 {
 	var integer len := lengthof(digits);
 	if (len rem 2 == 1) {	/* modulo remainder */
 		l3.oddevenIndicator := '1'B;
-		l3.fillerDigit := '1111'B;
+		l3.fillerDigit := omit;
 	} else {
 		l3.oddevenIndicator := '0'B;
-		l3.fillerDigit := omit;
+		l3.fillerDigit := '1111'B;
 	}
 	l3.digits := digits;
 	return l3;