diff --git a/src/plugins/coreplugin/coreconstants.h b/src/plugins/coreplugin/coreconstants.h
index 97494ad016b..49d486e3db9 100644
--- a/src/plugins/coreplugin/coreconstants.h
+++ b/src/plugins/coreplugin/coreconstants.h
@@ -201,7 +201,7 @@ const char DEFAULT_THEME[] = "flat";
 
 const char TR_CLEAR_MENU[]         = QT_TRANSLATE_NOOP("Core", "Clear Menu");
 
-const char DEFAULT_BUILD_DIRECTORY[] = "../build-%{CurrentProject:Name}-%{CurrentKit:FileSystemName}-%{CurrentBuild:Name}";
+const char DEFAULT_BUILD_DIRECTORY[] = "../%{JS: Util.asciify(\"build-%{CurrentProject:Name}-%{CurrentKit:FileSystemName}-%{CurrentBuild:Name}\")}";
 
 const int TARGET_ICON_SIZE = 32;