diff --git a/qtcreator.pro b/qtcreator.pro
index db093aedec08bae5b42d82570ed317fa837c3e81..229d97e856d5bb83b7394c031475a7ccd2e0fd69 100644
--- a/qtcreator.pro
+++ b/qtcreator.pro
@@ -52,7 +52,7 @@ exists(src/shared/qbs/qbs.pro) {
     }
     system("echo QBS_PLUGINS_INSTALL_DIR = $${QTC_PREFIX}/$${IDE_LIBRARY_BASENAME}/qtcreator >> $$qmake_cache")
     system("echo QBS_LIBRARY_DIRNAME = $${IDE_LIBRARY_BASENAME} >> $$qmake_cache")
-    system("echo QBS_APPS_DESTDIR = $${IDE_BIN_PATH} >> $$qmake_cache")
+    system("echo QBS_APPS_DESTDIR = $${maybe_backslash}\"$${IDE_BIN_PATH}$${maybe_backslash}\">> $$qmake_cache")
     system("echo QBS_APPS_INSTALL_DIR = $${QTC_PREFIX}/bin >> $$qmake_cache")
     system("echo CONFIG += qbs_no_dev_install >> $$qmake_cache")
 }