1 files changed, 1 insertions, 1 deletions

diff --git a/src/xfns.c b/src/xfns.c
index 32270bc47e1..b958c136f50 100644
--- a/src/xfns.c
+++ b/src/xfns.c
@@ -956,7 +956,7 @@ x_real_positions (f, xptr, yptr)
       XQueryTree (FRAME_X_DISPLAY (f), outer, &tmp_root_window,
                   &f->output_data.x->parent_desc,
                   &tmp_children, &tmp_nchildren);
-      XFree (tmp_children);
+      XFree ((char *) tmp_children);
 
       win_x = win_y = 0;