diff --git a/development/scons/SConstruct b/development/scons/SConstruct
index 8dd4252912..162fc034df 100644
--- a/development/scons/SConstruct
+++ b/development/scons/SConstruct
@@ -1749,7 +1749,7 @@ if build_qt4:
 #    qt4_moced_files = [frontend_env.Moc4(x.replace('.cpp', '_moc.cpp'), \
 #        x.replace('.cpp', '.h')) for x in qt4_moc_files]
 
-    qt4_moced_files = [frontend_env.Moc4("moc_" + x, x.replace('.cpp', '.h')) for x in qt4_moc_files]
+    qt4_moced_files = [frontend_env.Moc4(x.replace('.cpp', '_moc.cpp'), x.replace('.cpp', '.h')) for x in qt4_moc_files]
 
     qt4 = frontend_env.StaticLibrary(
         target = '$LOCALLIBPATH/qt4',