diff --git a/src/main/resources/assets/opencomputers/lua/kernel.lua b/src/main/resources/assets/opencomputers/lua/kernel.lua
index 98382f573..319d55fdf 100644
--- a/src/main/resources/assets/opencomputers/lua/kernel.lua
+++ b/src/main/resources/assets/opencomputers/lua/kernel.lua
@@ -577,7 +577,7 @@ do
     checkArg(3, repl, "number", "string", "function", "table")
     checkArg(4, n, "number", "nil")
 
-    if #s < SHORT_STRING then
+    if #s < SHORT_STRING or type(repl) == "function" then
       return string_gsub(s, pattern, repl, n)
     end