diff --git a/development/scons/SConstruct b/development/scons/SConstruct
index b531e08878..ebcb439e43 100644
--- a/development/scons/SConstruct
+++ b/development/scons/SConstruct
@@ -1637,6 +1637,7 @@ if build_qt2:
     # load qt2 tools
     qt2env.Tool('qt')
     qt2env['QT_UICDECLFLAGS'] = '-tr qt_'
+    qt2env['QT_UICIMPLFLAGS'] = '-tr qt_'
 
     qt2env.AppendUnique(CPPPATH = [
         '$BUILDDIR/common',