diff --git a/aegisub/automation/include/utils-auto4.lua b/aegisub/automation/include/utils-auto4.lua
index 200cdc7db..c28f64526 100644
--- a/aegisub/automation/include/utils-auto4.lua
+++ b/aegisub/automation/include/utils-auto4.lua
@@ -44,3 +44,6 @@ clamp = util.clamp
 interpolate = util.interpolate
 interpolate_color = util.interpolate_color
 interpolate_alpha = util.interpolate_alpha
+string.headtail = util.headtail
+string.trim = util.trim
+string.words = util.words