diff --git a/boards/msba2/include/periph_conf.h b/boards/msba2/include/periph_conf.h
index 4e2744b6cd..6e4dbb05b7 100644
--- a/boards/msba2/include/periph_conf.h
+++ b/boards/msba2/include/periph_conf.h
@@ -20,6 +20,7 @@
 #define PERIPH_CONF_H
 
 #include "periph_cpu.h"
+#include "kernel_defines.h"
 
 #ifdef __cplusplus
 extern "C" {