diff --git a/include/linux/bitops.h b/include/linux/bitops.h
index a47f6d17bb..259df43fb0 100644
--- a/include/linux/bitops.h
+++ b/include/linux/bitops.h
@@ -21,8 +21,13 @@
  * position @h. For example
  * GENMASK_ULL(39, 21) gives us the 64bit vector 0x000000ffffe00000.
  */
+#ifdef CONFIG_SANDBOX
+#define GENMASK(h, l) \
+	(((~0UL) << (l)) & (~0UL >> (CONFIG_SANDBOX_BITS_PER_LONG - 1 - (h))))
+#else
 #define GENMASK(h, l) \
 	(((~0UL) << (l)) & (~0UL >> (BITS_PER_LONG - 1 - (h))))
+#endif
 
 #define GENMASK_ULL(h, l) \
 	(((~0ULL) << (l)) & (~0ULL >> (BITS_PER_LONG_LONG - 1 - (h))))