1 files changed, 1 insertions, 1 deletions
diff --git a/src/xmlpatterns/schema/qxsdschemahelper.cpp b/src/xmlpatterns/schema/qxsdschemahelper.cpp
index 8072d92..c5e0ee0 100644
--- a/src/xmlpatterns/schema/qxsdschemahelper.cpp
+++ b/src/xmlpatterns/schema/qxsdschemahelper.cpp
@@ -635,7 +635,7 @@ bool XsdSchemaHelper::substitutionGroupOkTransitive(const XsdElement::Ptr &head,
 
         NamedSchemaComponent::BlockingConstraints checkSet(blockSet);
         checkSet |= head->disallowedSubstitutions();
-        if (head->type()->isComplexType()) {
+        if (head->type()->isComplexType() && head->type()->isDefinedBySchema()) {
             const XsdComplexType::Ptr complexType(head->type());
             checkSet |= complexType->prohibitedSubstitutions();
         }