diff --git a/src/bozo/bosint.xg b/src/bozo/bosint.xg
index 98c5fc1ffc..fef2f4d86b 100644
--- a/src/bozo/bosint.xg
+++ b/src/bozo/bosint.xg
@@ -135,7 +135,7 @@ GetCellName(
 ) = 94;
 
 GetCellHost(
-  IN afs_int32 awhich,
+  IN afs_uint32 awhich,
   OUT string name<BOZO_BSSIZE>
 ) = 95;
 
diff --git a/src/bozo/bosoprocs.c b/src/bozo/bosoprocs.c
index 8e5f867a52..76adc8f480 100644
--- a/src/bozo/bosoprocs.c
+++ b/src/bozo/bosoprocs.c
@@ -411,7 +411,7 @@ char **aname; {
 
 BOZO_GetCellHost(acall, awhich, aname)
 struct rx_call *acall;
-afs_int32 awhich;
+afs_uint32 awhich;
 char **aname; {
     register afs_int32 code;
     struct afsconf_cell tcell;