diff --git a/xwords4/common/util.h b/xwords4/common/util.h
index 0a10fe9c7..16dee7063 100644
--- a/xwords4/common/util.h
+++ b/xwords4/common/util.h
@@ -93,7 +93,7 @@ typedef struct UtilVtable {
                                 XWStreamCtxt* stream );
 
     /* return of < 0 means computer should pick */
-    XP_S16 (*m_util_userPickTile)( XW_UtilCtxt* uc, PickInfo* why, 
+    XP_S16 (*m_util_userPickTile)( XW_UtilCtxt* uc, PickInfo* pi, 
                                    XP_U16 playerNum,
                                    XP_UCHAR4* texts, XP_U16 nTiles );