diff --git a/src/plugins/debugger/cdb/cdb.pri b/src/plugins/debugger/cdb/cdb.pri
index 34a89b7042a17bb614fc8d62472d6f2a187ae9c3..a1ab1d4c4e6c9198d1834a424166c94153bb90f1 100644
--- a/src/plugins/debugger/cdb/cdb.pri
+++ b/src/plugins/debugger/cdb/cdb.pri
@@ -4,7 +4,7 @@
 win32 {
 contains(QMAKE_CXX, cl) {
 
-CDB_PATH=$$(CDB_PATH)
+CDB_PATH="$$(CDB_PATH)"
 isEmpty(CDB_PATH):CDB_PATH="$$(ProgramFiles)/Debugging Tools For Windows/sdk"
 
 !exists($$CDB_PATH):CDB_PATH="$$(ProgramFiles)/Debugging Tools For Windows (x86)/sdk"