diff --git a/src/tools/clangrefactoringbackend/clangrefactoringbackend.pro b/src/tools/clangrefactoringbackend/clangrefactoringbackend.pro
index 7312f543426..072ed244dbe 100644
--- a/src/tools/clangrefactoringbackend/clangrefactoringbackend.pro
+++ b/src/tools/clangrefactoringbackend/clangrefactoringbackend.pro
@@ -5,6 +5,11 @@ include(../../qtcreatortool.pri)
 include(../../shared/clang/clang_installation.pri)
 include(source/clangrefactoringbackend-source.pri)
 
+win32 {
+    LLVM_BUILDMODE = $$system($$llvm_config --build-mode, lines)
+    CONFIG(debug, debug|release):requires(equals(LLVM_BUILDMODE, "Debug"))
+}
+
 QT += core network
 QT -= gui