diff --git a/git-gui.sh b/git-gui.sh
index 79f980c47..b9e3d563e 100755
--- a/git-gui.sh
+++ b/git-gui.sh
@@ -4261,6 +4261,7 @@ $ctxm add command \
 	-label {Refresh} \
 	-font font_ui \
 	-command reshow_diff
+lappend diff_actions [list $ctxm entryconf [$ctxm index last] -state]
 $ctxm add command \
 	-label {Copy} \
 	-font font_ui \