diff --git a/cmake/kf5i18nuic.cmake b/cmake/kf5i18nuic.cmake
--- a/cmake/kf5i18nuic.cmake
+++ b/cmake/kf5i18nuic.cmake
@@ -35,9 +35,9 @@
 
 
 IF (_uic_CONTENTS)
-  #replace tr218n("") with QString::null to avoid warning from KLocale
-  STRING(REGEX REPLACE "tr2i18n\\(\"\"\\)" "QString::null" _uic_CONTENTS "${_uic_CONTENTS}" )
-  STRING(REGEX REPLACE "tr2i18n\\(\"\", \"\"\\)" "QString::null" _uic_CONTENTS "${_uic_CONTENTS}" )
+  #replace tr218n("") with QString() to avoid warning from KLocale
+  STRING(REGEX REPLACE "tr2i18n\\(\"\"\\)" "QString\\(\\)" _uic_CONTENTS "${_uic_CONTENTS}" )
+  STRING(REGEX REPLACE "tr2i18n\\(\"\", \"\"\\)" "QString\\(\\)" _uic_CONTENTS "${_uic_CONTENTS}" )
   #replace image15_data with img15_filename to make enable_final work
   STRING(REGEX REPLACE "image([0-9]+)_data" "img\\1_${KDE_UIC_BASENAME}" _uic_CONTENTS "${_uic_CONTENTS}")
   #fixup include guard
diff --git a/docs/programmers-guide.md b/docs/programmers-guide.md
--- a/docs/programmers-guide.md
+++ b/docs/programmers-guide.md
@@ -1170,8 +1170,8 @@
 uifile=fooconfpage.ui
 uihfile=$uifile.h
 uic -tr tr2i18n $uifile -o $uihfile
-sed -i 's/tr2i18n("")/QString::null/g' $uihfile
-sed -i 's/tr2i18n("", "")/QString::null/g' $uihfile
+sed -i 's/tr2i18n("")/QString()/g' $uihfile
+sed -i 's/tr2i18n("", "")/QString()/g' $uihfile
 sed -i "1i\#define TRANSLATION_DOMAIN \"$domain\"\n#include <klocalizedstring.h>" $uihfile
 ~~~