diff --git a/boards/calliope-mini/mini/mini.c b/boards/calliope-mini/mini/mini.c
index c4ba5aeb9e..f7a8c3206d 100644
--- a/boards/calliope-mini/mini/mini.c
+++ b/boards/calliope-mini/mini/mini.c
@@ -27,7 +27,7 @@
 #include "periph/gpio.h"
 #include "periph/timer.h"
 
-#define ENABLE_DEBUG        (0)
+#define ENABLE_DEBUG        0
 #include "debug.h"
 
 /**
diff --git a/boards/microbit/microbit/microbit.c b/boards/microbit/microbit/microbit.c
index 94d0dc8b3b..3dc1ff8c1b 100644
--- a/boards/microbit/microbit/microbit.c
+++ b/boards/microbit/microbit/microbit.c
@@ -27,7 +27,7 @@
 #include "periph/gpio.h"
 #include "periph/timer.h"
 
-#define ENABLE_DEBUG        (0)
+#define ENABLE_DEBUG        0
 #include "debug.h"
 
 /**