diff --git a/stdlib/REPL/src/REPL.jl b/stdlib/REPL/src/REPL.jl
index f2d78071c5642..ea792e11e8e52 100644
--- a/stdlib/REPL/src/REPL.jl
+++ b/stdlib/REPL/src/REPL.jl
@@ -1853,10 +1853,11 @@ function out_transform(@nospecialize(x), n::Ref{Int})
     end)
 end
 
-function get_usings!(usings, ex)
+function get_usings!(usings, @nospecialize(ex))
     ex isa Expr || return usings
     # get all `using` and `import` statements which are at the top level
-    for (i, arg) in enumerate(ex.args)
+    for i in 1:length(ex.args)
+        arg = ex.args[i]
         if Base.isexpr(arg, :toplevel)
             get_usings!(usings, arg)
         elseif Base.isexpr(arg, [:using, :import])