diff --git a/bin/fzf-tmux b/bin/fzf-tmux
index 53dfd9bc..300de7a5 100755
--- a/bin/fzf-tmux
+++ b/bin/fzf-tmux
@@ -180,6 +180,7 @@ trap 'cleanup 1' SIGUSR1
 trap 'cleanup' EXIT
 
 envs="env TERM=$TERM "
+[[ "$opt" =~ "-K -E" ]] && FZF_DEFAULT_OPTS="--margin 0,1 $FZF_DEFAULT_OPTS"
 [[ -n "$FZF_DEFAULT_OPTS"    ]] && envs="$envs FZF_DEFAULT_OPTS=$(printf %q "$FZF_DEFAULT_OPTS")"
 [[ -n "$FZF_DEFAULT_COMMAND" ]] && envs="$envs FZF_DEFAULT_COMMAND=$(printf %q "$FZF_DEFAULT_COMMAND")"