diff --git a/helpers/PyQt5TranslationMacros.cmake b/helpers/PyQt5TranslationMacros.cmake
index d9308ee..e2d6134 100644
--- a/helpers/PyQt5TranslationMacros.cmake
+++ b/helpers/PyQt5TranslationMacros.cmake
@@ -77,7 +77,7 @@ function(PYQT5_CREATE_TRANSLATION _qm_files)
         endif()
         add_custom_command(OUTPUT ${_ts_file}
             COMMAND ${PYTHON_ROOT}/PCbuild/amd64/python.exe
-            ARGS -m PyQt5.pylupdate_main ${_lupdate_options} ${_lst_file_srcs} -ts ${_ts_file}
+            ARGS -I -m PyQt5.pylupdate_main ${_lupdate_options} ${_lst_file_srcs} -ts ${_ts_file}
             DEPENDS ${_lst_file_srcs}
             WORKING_DIRECTORY ${PYTHON_ROOT}
             VERBATIM)
diff --git a/python_plugin.cmake b/python_plugin.cmake
index 595ba96..eabea9e 100644
--- a/python_plugin.cmake
+++ b/python_plugin.cmake
@@ -55,6 +55,7 @@ macro(do_src)
 
 				execute_process(
 					COMMAND ${PYTHON_ROOT}/PCbuild/amd64/python.exe
+						-I
 						-m PyQt5.uic.pyuic
 						-o "${output}"
 						"${object}"
@@ -68,6 +69,7 @@ macro(do_src)
 
 				execute_process(
 					COMMAND ${PYTHON_ROOT}/PCbuild/amd64/python.exe
+						-I
 						-m PyQt5.pyrcc_main
 						-o "${output}"
 						"${object}"