diff --git a/include/linux/compat.h b/include/linux/compat.h
index 41c9f65..7e05fce 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -561,5 +561,9 @@
 		unsigned long liovcnt, const struct compat_iovec __user *rvec,
 		unsigned long riovcnt, unsigned long flags);
 
+#else
+
+#define is_compat_task() (0)
+
 #endif /* CONFIG_COMPAT */
 #endif /* _LINUX_COMPAT_H */