diff --git a/basis/alien/c-types/c-types.factor b/basis/alien/c-types/c-types.factor
index 1e786cba79..9d4b61500e 100644
--- a/basis/alien/c-types/c-types.factor
+++ b/basis/alien/c-types/c-types.factor
@@ -421,8 +421,8 @@ M: pointer lookup-c-type
             8 >>size
             t >>signed
             8-byte-alignment
-            "from_signed_8" >>boxer
-            "to_signed_8" >>unboxer
+            "from_signed_cell" >>boxer
+            "to_fixnum" >>unboxer
             [ >integer ] >>unboxer-quot
         \ longlong typedef
 
@@ -433,8 +433,8 @@ M: pointer lookup-c-type
             [ set-alien-unsigned-8 ] >>setter
             8 >>size
             8-byte-alignment
-            "from_unsigned_8" >>boxer
-            "to_unsigned_8" >>unboxer
+            "from_unsigned_cell" >>boxer
+            "to_cell" >>unboxer
             [ >integer ] >>unboxer-quot
         \ ulonglong typedef