diff --git a/tests/118-per-constraint-OK.asn1 b/tests/118-per-constraint-OK.asn1
new file mode 100644
index 0000000..d7c840b
--- /dev/null
+++ b/tests/118-per-constraint-OK.asn1
@@ -0,0 +1,16 @@
+
+-- OK: Everything is fine
+
+-- iso.org.dod.internet.private.enterprise (1.3.6.1.4.1)
+-- .spelio.software.asn1c.test (9363.1.5.1)
+-- .118
+
+ModuleConstraintPrecedence
+	{ iso org(3) dod(6) internet (1) private(4) enterprise(1)
+		spelio(9363) software(1) asn1c(5) test(1) 118 }
+	DEFINITIONS ::=
+BEGIN
+
+	C ::= IA5String (SIZE(10) ^ FROM("A".."D") | SIZE(20) ^ FROM("D".."F"))
+
+END