diff --git a/tests/unittests/embunit/textui/TextUIRunner.h b/tests/unittests/embunit/textui/TextUIRunner.h
index 3fdf9ef1556783d169e04bf28d623d4ce3c1ca49..cbfa2efab2e8e48881d622c5c243cccd10a982d5 100644
--- a/tests/unittests/embunit/textui/TextUIRunner.h
+++ b/tests/unittests/embunit/textui/TextUIRunner.h
@@ -35,6 +35,8 @@
 #ifndef	__TEXTUIRUNNER_H__
 #define	__TEXTUIRUNNER_H__
 
+#include "Outputter.h"
+
 #include <embUnit/embUnit.h>
 
 void TextUIRunner_setOutputter(OutputterRef outputter);