diff --git a/qwt/src/src.pro b/qwt/src/src.pro
index dcac61239..440a48bd3 100644
--- a/qwt/src/src.pro
+++ b/qwt/src/src.pro
@@ -17,7 +17,7 @@ include( $${QWT_ROOT}/qwtfunctions.pri )
 TEMPLATE          = lib
 TARGET            = $$qwtLibraryTarget(qwt)
 
-DESTDIR           = $${OUT_PWD}/../lib
+DESTDIR           = $$replace($${OUT_PWD}/../lib," ","\\ ")
 
 contains(QWT_CONFIG, QwtDll) {