diff --git a/tests/nanocoap_cli/request_handlers.c b/tests/nanocoap_cli/request_handlers.c
index a6a672c75d..32b78254b4 100644
--- a/tests/nanocoap_cli/request_handlers.c
+++ b/tests/nanocoap_cli/request_handlers.c
@@ -25,6 +25,7 @@
 
 #include "fmt.h"
 #include "net/nanocoap.h"
+#include "kernel_defines.h"
 
 #define _MAX_PAYLOAD_LEN  (16)