diff --git a/plugins/refresh/refresh.plugin.zsh b/plugins/refresh/refresh.plugin.zsh
old mode 100644
new mode 100755
index 425ed91ec..7e369a8bc
--- a/plugins/refresh/refresh.plugin.zsh
+++ b/plugins/refresh/refresh.plugin.zsh
@@ -1,8 +1,16 @@
 #!/usr/bin/env zsh
 # ------------------------------------------------------------------------------
 # Simple ZLE widget that binds F5 to "source ~/.zshrc".
+#
+# You can bind it to another ikey by setting the REFRESH_KEY
+# environment variable, for example to bind F4 instead of F5:
+#   export REFRESH_KEY=$terminfo[kf4]
 # ------------------------------------------------------------------------------
 
+# Default key is F5.
+DEFAULT_REFRESH_KEY=$terminfo[kf5]
+
 _refresh() { source ~/.zshrc }
 zle -N _refresh
-bindkey '^[[15~' _refresh
+bindkey ${REFRESH_KEY:-$DEFAULT_REFRESH_KEY} _refresh
+