diff --git a/ChangeLog b/ChangeLog
index 838c62883..1cc0203e8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2004-08-15  Rob Adams  <readams@readams.net>
+
+	* src/windows.c (meta_window_update_struts): use height and
+	top/bottom struts to compute gap (copy/paste bug).
+
 2004-08-15  Rob Adams  <readams@readams.net>
 
 	* src/window.c (meta_window_update_struts): Allow struts larger
diff --git a/src/window.c b/src/window.c
index 478311b3e..36efa5fe5 100644
--- a/src/window.c
+++ b/src/window.c
@@ -5311,7 +5311,7 @@ meta_window_update_struts (MetaWindow *window)
           new_has_struts = TRUE;
           new_left.width = (int) struts[0] + MIN (0, gap/2);
           new_right.width = (int) struts[1] + MIN (0, gap/2);
-          gap = window->screen->width - struts[0] - struts[1];
+          gap = window->screen->height - struts[2] - struts[3];
           gap -= MIN_EMPTY;
           new_top.height = (int)struts[2] + MIN (0, gap/2);
           new_bottom.height = (int)struts[3] + MIN (0, gap/2);
@@ -5364,7 +5364,7 @@ meta_window_update_struts (MetaWindow *window)
               new_has_struts = TRUE;
               new_left.width = (int) struts[0] + MIN (0, gap/2);
               new_right.width = (int) struts[1] + MIN (0, gap/2);
-              gap = window->screen->width - struts[0] - struts[1];
+              gap = window->screen->height - struts[2] - struts[3];
               gap -= MIN_EMPTY;
               new_top.height = (int)struts[2] + MIN (0, gap/2);
               new_bottom.height = (int)struts[3] + MIN (0, gap/2);