diff --git a/include/asm-ia64/processor.h b/include/asm-ia64/processor.h
index 5830d36fd8e6a407697001a1f5c0aeef9c4747f6..4f4ee1c2db2fb8177b12a589fb9b1a512915505e 100644
--- a/include/asm-ia64/processor.h
+++ b/include/asm-ia64/processor.h
@@ -210,7 +210,7 @@ struct desc_struct {
 	unsigned int a, b;
 };
 
-#define desc_empty(desc)		(!((desc)->a + (desc)->b))
+#define desc_empty(desc)		(!((desc)->a | (desc)->b))
 #define desc_equal(desc1, desc2)	(((desc1)->a == (desc2)->a) && ((desc1)->b == (desc2)->b))
 
 #define GDT_ENTRY_TLS_ENTRIES	3