diff --git a/tools/testing/radix-tree/linux/kernel.h b/tools/testing/radix-tree/linux/kernel.h
index 6d0cdf6..76a88f3 100644
--- a/tools/testing/radix-tree/linux/kernel.h
+++ b/tools/testing/radix-tree/linux/kernel.h
@@ -9,6 +9,9 @@
 
 #include "../../include/linux/compiler.h"
 
+#define CONFIG_SHMEM
+#define CONFIG_SWAP
+
 #ifndef NULL
 #define NULL	0
 #endif