1 files changed, 7 insertions, 0 deletions
diff --git a/sources/shiboken2/generator/shiboken2/shibokengenerator.cpp b/sources/shiboken2/generator/shiboken2/shibokengenerator.cpp
index fbd3c314b..a712c3ebb 100644
--- a/sources/shiboken2/generator/shiboken2/shibokengenerator.cpp
+++ b/sources/shiboken2/generator/shiboken2/shibokengenerator.cpp
@@ -2219,6 +2219,13 @@ ShibokenGenerator::AttroCheck ShibokenGenerator::checkAttroFunctionNeeds(const A
             result |= AttroCheckFlag::SetattroQObject;
         if (useOverrideCaching(metaClass))
             result |= AttroCheckFlag::SetattroMethodOverride;
+        // PYSIDE-1255: If setattro is generated for a class inheriting
+        // QObject, the property code needs to be generated, too.
+        if ((result & AttroCheckFlag::SetattroMask) != 0
+            && !result.testFlag(AttroCheckFlag::SetattroQObject)
+            && metaClass->isQObject()) {
+            result |= AttroCheckFlag::SetattroQObject;
+        }
     }
     return result;
 }