diff --git a/tests/tests-asn1c-compiler/50-constraint-OK.asn1.-Pgen-PER b/tests/tests-asn1c-compiler/50-constraint-OK.asn1.-Pgen-PER
index 6499e91..f198842 100644
--- a/tests/tests-asn1c-compiler/50-constraint-OK.asn1.-Pgen-PER
+++ b/tests/tests-asn1c-compiler/50-constraint-OK.asn1.-Pgen-PER
@@ -427,7 +427,7 @@
 	
 	value = *(const long *)sptr;
 	
-	if((value >= 1 && value <= 256)) {
+	if((value >= 1 && value <= 255)) {
 		/* Constraint check succeeded */
 		return 0;
 	} else {
@@ -446,7 +446,7 @@
 /*** <<< CTDEFS [ExtensibleExtensions] >>> ***/
 
 static asn_per_constraints_t asn_PER_type_ExtensibleExtensions_constr_1 GCC_NOTUSED = {
-	{ APC_CONSTRAINED | APC_EXTENSIBLE,  8,  8,  1,  256 }	/* (1..256,...) */,
+	{ APC_CONSTRAINED | APC_EXTENSIBLE,  8,  8,  1,  255 }	/* (1..255,...) */,
 	{ APC_UNCONSTRAINED,	-1, -1,  0,  0 },
 	0, 0	/* No PER value map */
 };