diff --git a/src/builtins/source.rs b/src/builtins/source.rs
index edf8d9bfb..f58867747 100644
--- a/src/builtins/source.rs
+++ b/src/builtins/source.rs
@@ -86,12 +86,8 @@ pub fn source(parser: &Parser, streams: &mut IoStreams, args: &mut [&wstr]) -> O
     // Construct argv from our null-terminated list.
     // This is slightly subtle. If this is a bare `source` with no args then `argv + optind` already
     // points to the end of argv. Otherwise we want to skip the file name to get to the args if any.
-    let mut argv_list: Vec<WString> = vec![];
     let remaining_args = &args[optind + if argc == optind { 0 } else { 1 }..];
-    #[allow(clippy::unnecessary_to_owned)]
-    for arg in remaining_args.iter().copied() {
-        argv_list.push(arg.to_owned());
-    }
+    let argv_list = remaining_args.iter().map(|&arg| arg.to_owned()).collect();
     parser.vars().set_argv(argv_list);
 
     let mut retval = reader_read(parser, fd, streams.io_chain);