diff --git a/tools/testing/radix-tree/idr-test.c b/tools/testing/radix-tree/idr-test.c
index ca24f6839d50..84b8c3c92c79 100644
--- a/tools/testing/radix-tree/idr-test.c
+++ b/tools/testing/radix-tree/idr-test.c
@@ -424,6 +424,7 @@ void idr_checks(void)
 #define module_init(x)
 #define module_exit(x)
 #define MODULE_AUTHOR(x)
+#define MODULE_DESCRIPTION(X)
 #define MODULE_LICENSE(x)
 #define dump_stack()    assert(0)
 void ida_dump(struct ida *);