diff --git a/pkg/goformation/generate/property.go b/pkg/goformation/generate/property.go
index 00b13877a1..209508c9e7 100644
--- a/pkg/goformation/generate/property.go
+++ b/pkg/goformation/generate/property.go
@@ -191,7 +191,7 @@ func (p Property) HasValidType() bool {
 
 // IsPolymorphic checks whether a property can be multiple different types
 func (p Property) IsPolymorphic() bool {
-	return len(p.PrimitiveTypes) > 0 || len(p.PrimitiveItemTypes) > 0 || len(p.PrimitiveItemTypes) > 0 || len(p.ItemTypes) > 0 || len(p.Types) > 0
+	return len(p.PrimitiveTypes) > 0 || len(p.PrimitiveItemTypes) > 0 || len(p.ItemTypes) > 0 || len(p.Types) > 0
 }
 
 // IsPrimitive checks whether a property is a primitive type