diff --git a/src/libs/cplusplus/pp-engine.cpp b/src/libs/cplusplus/pp-engine.cpp
index 00e32a0f04d..d9897741ba5 100644
--- a/src/libs/cplusplus/pp-engine.cpp
+++ b/src/libs/cplusplus/pp-engine.cpp
@@ -1130,6 +1130,11 @@ void Preprocessor::handleIncludeDirective(PPToken *tk)
     }
     included = included.trimmed();
 
+    if (included.isEmpty()) {
+        //### TODO: error message
+        return;
+    }
+
 //    qDebug("include [[%s]]", included.toUtf8().constData());
     Client::IncludeType mode;
     if (included.at(0) == '"')