diff --git a/include/linux/compat.h b/include/linux/compat.h
index 846bb1792572..edaf3900f6bc 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -561,5 +561,9 @@ extern ssize_t compat_rw_copy_check_uvector(int type,
 
 extern void __user *compat_alloc_user_space(unsigned long len);
 
+#else
+
+#define is_compat_task() (0)
+
 #endif /* CONFIG_COMPAT */
 #endif /* _LINUX_COMPAT_H */