diff --git a/target/alpha/translate.c b/target/alpha/translate.c
index 9d25e21164..ffbac1c114 100644
--- a/target/alpha/translate.c
+++ b/target/alpha/translate.c
@@ -72,7 +72,7 @@ struct DisasContext {
 #ifdef CONFIG_USER_ONLY
 #define UNALIGN(C)  (C)->unalign
 #else
-#define UNALIGN(C)  0
+#define UNALIGN(C)  MO_ALIGN
 #endif
 
 /* Target-specific return values from translate_one, indicating the