diff --git a/src/shared/clang/clang_installation.pri b/src/shared/clang/clang_installation.pri
index 63ad0ad538c..a41c118ebd8 100644
--- a/src/shared/clang/clang_installation.pri
+++ b/src/shared/clang/clang_installation.pri
@@ -144,7 +144,6 @@ isEmpty(LLVM_VERSION) {
         versionIsEqual($$LLVM_VERSION, 5, 0)|!isEmpty(QTC_FORCE_CLANG_LIBTOOLING) {
             !contains(QMAKE_DEFAULT_LIBDIRS, $$LLVM_LIBDIR): LIBTOOLING_LIBS = -L$${LLVM_LIBDIR}
             LIBTOOLING_LIBS += $$CLANGTOOLING_LIBS $$LLVM_STATIC_LIBS
-            contains(QMAKE_DEFAULT_INCDIRS, $$LLVM_INCLUDEPATH): LLVM_INCLUDEPATH =
         } else {
             warning("Clang LibTooling is disabled because only version 5.0 is supported.")
         }
@@ -152,6 +151,8 @@ isEmpty(LLVM_VERSION) {
         warning("Clang LibTooling is disabled.")
     }
 
+    contains(QMAKE_DEFAULT_INCDIRS, $$LLVM_INCLUDEPATH): LLVM_INCLUDEPATH =
+
     # Remove unwanted flags. It is a workaround for linking.
     # It is not intended for cross compiler linking.
     LLVM_CXXFLAGS = $$system($$llvm_config --cxxflags, lines)