1 files changed, 4 insertions, 0 deletions
diff --git a/insns.def b/insns.def
index d89d989ac6..cb7802e704 100644
--- a/insns.def
+++ b/insns.def
@@ -943,6 +943,8 @@ defineclass
 	    cbase = vm_get_cbase(th);
 	}
 
+	vm_check_if_namespace(cbase);
+
 	/* find klass */
 	if (rb_const_defined_at(cbase, id)) {
 	    /* already exist */
@@ -981,6 +983,8 @@ defineclass
 	    cbase = vm_get_cbase(th);
 	}
 
+	vm_check_if_namespace(cbase);
+
 	/* find klass */
 	if (rb_const_defined_at(cbase, id)) {
 	    klass = rb_const_get_at(cbase, id);