diff --git a/src/plugins/plugins.pro b/src/plugins/plugins.pro
index d1c774128bb..fa872bb39f0 100644
--- a/src/plugins/plugins.pro
+++ b/src/plugins/plugins.pro
@@ -101,8 +101,8 @@ isEmpty(LLVM_INSTALL_DIR):LLVM_INSTALL_DIR=$$(LLVM_INSTALL_DIR)
 exists($$LLVM_INSTALL_DIR) {
     SUBDIRS += clangcodemodel
 
-    QTC_NO_CLANG_LIBTOOLING=$$(QTC_NO_CLANG_LIBTOOLING)
-    isEmpty(QTC_NO_CLANG_LIBTOOLING) {
+    LIBTOOLING_LIBS=$$(LIBTOOLING_LIBS)
+    !isEmpty(LIBTOOLING_LIBS) {
         SUBDIRS += clangrefactoring
         SUBDIRS += clangpchmanager
     } else {
diff --git a/src/tools/tools.pro b/src/tools/tools.pro
index cfe34abaa0a..2e62f31b2c4 100644
--- a/src/tools/tools.pro
+++ b/src/tools/tools.pro
@@ -24,8 +24,8 @@ isEmpty(LLVM_INSTALL_DIR):LLVM_INSTALL_DIR=$$(LLVM_INSTALL_DIR)
 exists($$LLVM_INSTALL_DIR) {
     SUBDIRS += clangbackend
 
-    QTC_NO_CLANG_LIBTOOLING=$$(QTC_NO_CLANG_LIBTOOLING)
-    isEmpty(QTC_NO_CLANG_LIBTOOLING) {
+    LIBTOOLING_LIBS=$$(LIBTOOLING_LIBS)
+    !isEmpty(LIBTOOLING_LIBS) {
         SUBDIRS += clangrefactoringbackend
         SUBDIRS += clangpchmanagerbackend
     } else {