diff --git a/po/de.po b/po/de.po
index c3d05da8b..13a991314 100644
--- a/po/de.po
+++ b/po/de.po
@@ -708,10 +708,6 @@ msgstr "%ls: Erwartete numerischen Wert"
 msgid "%ls: fish was not built with embedded files"
 msgstr ""
 
-#, c-format
-msgid "%ls: function name required"
-msgstr "%ls: Brauche Funktionsnamen"
-
 #, c-format
 msgid "%ls: given %d indexes but %d values\n"
 msgstr ""
diff --git a/po/en.po b/po/en.po
index 6e167d8b5..0e176bab9 100644
--- a/po/en.po
+++ b/po/en.po
@@ -706,10 +706,6 @@ msgstr "%ls: expected a numeric value"
 msgid "%ls: fish was not built with embedded files"
 msgstr ""
 
-#, c-format
-msgid "%ls: function name required"
-msgstr ""
-
 #, c-format
 msgid "%ls: given %d indexes but %d values\n"
 msgstr ""
diff --git a/po/fr.po b/po/fr.po
index f7e0fbbf4..1d8c1856d 100644
--- a/po/fr.po
+++ b/po/fr.po
@@ -807,10 +807,6 @@ msgstr "%ls : valeur numérique attendue"
 msgid "%ls: fish was not built with embedded files"
 msgstr ""
 
-#, c-format
-msgid "%ls: function name required"
-msgstr ""
-
 #, c-format
 msgid "%ls: given %d indexes but %d values\n"
 msgstr ""
diff --git a/po/pl.po b/po/pl.po
index 604e85d3e..bca34e8dc 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -702,10 +702,6 @@ msgstr "%ls: oczekiwano wartości liczbowej"
 msgid "%ls: fish was not built with embedded files"
 msgstr ""
 
-#, c-format
-msgid "%ls: function name required"
-msgstr ""
-
 #, c-format
 msgid "%ls: given %d indexes but %d values\n"
 msgstr ""
diff --git a/po/pt_BR.po b/po/pt_BR.po
index b7e93904c..3b40793d8 100644
--- a/po/pt_BR.po
+++ b/po/pt_BR.po
@@ -707,10 +707,6 @@ msgstr "%ls: esperava valor numérico"
 msgid "%ls: fish was not built with embedded files"
 msgstr ""
 
-#, c-format
-msgid "%ls: function name required"
-msgstr ""
-
 #, c-format
 msgid "%ls: given %d indexes but %d values\n"
 msgstr ""
diff --git a/po/sv.po b/po/sv.po
index ddff174b4..96207d5c6 100644
--- a/po/sv.po
+++ b/po/sv.po
@@ -703,10 +703,6 @@ msgstr ""
 msgid "%ls: fish was not built with embedded files"
 msgstr ""
 
-#, c-format
-msgid "%ls: function name required"
-msgstr ""
-
 #, c-format
 msgid "%ls: given %d indexes but %d values\n"
 msgstr ""
diff --git a/po/zh_CN.po b/po/zh_CN.po
index 2629b8c72..f3693df16 100644
--- a/po/zh_CN.po
+++ b/po/zh_CN.po
@@ -700,10 +700,6 @@ msgstr "%ls: 预期数字类型值"
 msgid "%ls: fish was not built with embedded files"
 msgstr ""
 
-#, c-format
-msgid "%ls: function name required"
-msgstr "%ls: 函数名称是必须的"
-
 #, c-format
 msgid "%ls: given %d indexes but %d values\n"
 msgstr "%ls: 给定的 %d 索引但 %d 值\n"
diff --git a/src/builtins/function.rs b/src/builtins/function.rs
index fcbf55e4a..687406f7d 100644
--- a/src/builtins/function.rs
+++ b/src/builtins/function.rs
@@ -243,20 +243,7 @@ fn parse_cmd_opts(
     STATUS_CMD_OK
 }
 
-fn validate_function_name(
-    argv: &mut [&wstr],
-    function_name: &mut WString,
-    cmd: &wstr,
-    streams: &mut IoStreams,
-) -> c_int {
-    if argv.len() < 2 {
-        // This is currently impossible but let's be paranoid.
-        streams
-            .err
-            .append(wgettext_fmt!("%ls: function name required", cmd));
-        return STATUS_INVALID_ARGS;
-    }
-    *function_name = argv[1].to_owned();
+fn validate_function_name(function_name: &wstr, cmd: &wstr, streams: &mut IoStreams) -> c_int {
     if !valid_func_name(function_name) {
         streams.err.append(wgettext_fmt!(
             "%ls: %ls: invalid function name",
@@ -294,8 +281,8 @@ pub fn function(
     let cmd = argv[0];
 
     // A valid function name has to be the first argument.
-    let mut function_name = WString::new();
-    let mut retval = validate_function_name(argv, &mut function_name, cmd, streams);
+    let function_name = argv[1].to_owned();
+    let mut retval = validate_function_name(&function_name, cmd, streams);
     if retval != STATUS_CMD_OK {
         return retval;
     }