diff --git a/library/L3_Templates.ttcn b/library/L3_Templates.ttcn
index 2eb0bb2..5bd87eb 100644
--- a/library/L3_Templates.ttcn
+++ b/library/L3_Templates.ttcn
@@ -1112,7 +1112,7 @@
 	lengthIndicator := 0,			/* overwritten */
 	numberingPlanIdentification := '0000'B,
 	typeOfNumber := '000'B,			/* unknown */
-	ext1 := '0'B,
+	ext1 := '1'B, /* no extension */
 	digits := digits
 }
 
@@ -1121,7 +1121,7 @@
 	lengthIndicator := ?,
 	numberingPlanIdentification := ?,
 	typeOfNumber := ?,
-	ext1 := ?,
+	ext1 := '1'B, /* no extension */
 	digits := digits
 }