diff --git a/xwords4/common/board.c b/xwords4/common/board.c
index 95c5c2153..204b5809f 100644
--- a/xwords4/common/board.c
+++ b/xwords4/common/board.c
@@ -2525,7 +2525,7 @@ holdsPendingTile( BoardCtxt* board, XP_U16 pencol, XP_U16 penrow )
  * return it to the tray.  But don't do this in drag-and-drop case since it's
  * too easy to accidentally tap and there are better ways.
  */
-XP_Bool
+static XP_Bool
 tryReplaceTile( BoardCtxt* board, XP_U16 pencol, XP_U16 penrow )
 {
     XP_Bool result = XP_FALSE;
diff --git a/xwords4/common/boardp.h b/xwords4/common/boardp.h
index 7e44d7683..983251f3e 100644
--- a/xwords4/common/boardp.h
+++ b/xwords4/common/boardp.h
@@ -219,7 +219,6 @@ void invalDragObj( BoardCtxt* board, const DragObjInfo* di );
 void invalTrayTilesAbove( BoardCtxt* board, XP_U16 tileIndex );
 void invalTrayTilesBetween( BoardCtxt* board, XP_U16 tileIndex1, 
                             XP_U16 tileIndex2 );
-XP_Bool tryReplaceTile( BoardCtxt* board, XP_U16 pencol, XP_U16 penrow );
 void moveTileInTray( BoardCtxt* board, XP_U16 moveTo, XP_U16 moveFrom );
 XP_UCHAR* getTileDrawInfo( const BoardCtxt* board, Tile tile, XP_Bool isBlank,
                            XP_Bitmap* bitmap, XP_S16* value,