diff --git a/include/linux/mm.h b/include/linux/mm.h
index 26e1663..498ff87 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1051,7 +1051,11 @@
 void drop_pagecache(void);
 void drop_slab(void);
 
+#ifndef CONFIG_MMU
+#define randomize_va_space 0
+#else
 extern int randomize_va_space;
+#endif
 
 #endif /* __KERNEL__ */
 #endif /* _LINUX_MM_H */