diff --git a/lib/asn1/gen.c b/lib/asn1/gen.c
index b640d608d..e3b2b1f98 100644
--- a/lib/asn1/gen.c
+++ b/lib/asn1/gen.c
@@ -567,6 +567,7 @@ define_type (int level, const char *name, Type *t, int typedefp, int preservep)
 	i.type = TInteger;
 	i.range = ⦥
 	i.members = NULL;
+	i.constraint = NULL;
 
 	space(level);
 	if(ASN1_TAILQ_EMPTY(t->members)) 
@@ -640,6 +641,7 @@ define_type (int level, const char *name, Type *t, int typedefp, int preservep)
 	i.type = TInteger;
 	i.range = ⦥
 	i.members = NULL;
+	i.constraint = NULL;
 
 	space(level);
 	fprintf (headerfile, "struct %s {\n", typedefp ? name : "");