diff --git a/src/plugins/clangtools/clangtools.pro b/src/plugins/clangtools/clangtools.pro
index 021d31b5c6f..60a703af081 100644
--- a/src/plugins/clangtools/clangtools.pro
+++ b/src/plugins/clangtools/clangtools.pro
@@ -1,6 +1,8 @@
 include(../../qtcreatorplugin.pri)
 include(../../shared/clang/clang_installation.pri)
 
+requires(!isEmpty(LLVM_VERSION))
+
 LIBS += $$LIBCLANG_LIBS
 INCLUDEPATH += $$LLVM_INCLUDEPATH