diff --git a/plugins/extensions/pykrita/sip/CMakeLists.txt b/plugins/extensions/pykrita/sip/CMakeLists.txt
--- a/plugins/extensions/pykrita/sip/CMakeLists.txt
+++ b/plugins/extensions/pykrita/sip/CMakeLists.txt
@@ -14,7 +14,7 @@
 
 set(SIP_CONCAT_PARTS 1)
 set(SIP_TAGS ALL WS_X11 ${PYQT5_VERSION_TAG})
-set(SIP_EXTRA_OPTIONS -g -x PyKDE_QVector ${PYQT5_SIP_NAME})
+set(SIP_EXTRA_OPTIONS -g -o -x PyKDE_QVector ${PYQT5_SIP_NAME})
 
 set(PYTHON_SITE_PACKAGES_INSTALL_DIR ${LIB_INSTALL_DIR}/krita-python-libs)
 file(GLOB PYKRITA_KRITA_sip_files ./krita/*.sip)