diff --git a/src/tests/check_Length.cpp b/src/tests/check_Length.cpp
index 3ee9f95697..cfd449ce78 100644
--- a/src/tests/check_Length.cpp
+++ b/src/tests/check_Length.cpp
@@ -1,8 +1,8 @@
 #include <config.h>
 
-#include "../Length.h"
-#include "../LyXRC.h"
-#include "../support/debug.h"
+#include "LyXRC.h"
+#include "support/debug.h"
+#include "support/Length.h"
 
 #include <iostream>