diff --git a/AUTHORS b/AUTHORS
index 92045428c..c5a2fdec7 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -158,6 +158,7 @@ Contributors:
     * VXNCXNX
 
     * jackwalkerlabs (Codex-assisted)
+    * youdie006
 
 Creator:
 --------
diff --git a/changelog.rst b/changelog.rst
index 81fbefe78..2f9e32872 100644
--- a/changelog.rst
+++ b/changelog.rst
@@ -6,6 +6,10 @@ Features:
 * Add a ``\service`` prompt token for connections made using ``service=...``
   or ``PGSERVICE``. For example, set ``prompt = '\service> '``.
 
+Bug fixes:
+----------
+* Fix ``NoneType`` crash when completing functions with unnamed (variadic) arguments (#1204).
+
 4.7.1 (2026-09-20)
 ==================
 
diff --git a/pgcli/packages/parseutils/meta.py b/pgcli/packages/parseutils/meta.py
index df41cf4ee..4eded3d79 100644
--- a/pgcli/packages/parseutils/meta.py
+++ b/pgcli/packages/parseutils/meta.py
@@ -151,7 +151,7 @@ def fields(self):
 
         if self.return_type.lower() == "void":
             return []
-        elif not self.arg_modes:
+        elif not any(mode in ("o", "b", "t") for mode in self.arg_modes or []):
             # For functions  without output parameters, the function name
             # is used as the name of the output column.
             # E.g. 'SELECT unnest FROM unnest(...);'
@@ -159,6 +159,6 @@ def fields(self):
 
         return [
             ColumnMetadata(name, typ, [])
-            for name, typ, mode in zip(self.arg_names, self.arg_types, self.arg_modes)
+            for name, typ, mode in zip(self.arg_names or [], self.arg_types or [], self.arg_modes)
             if mode in ("o", "b", "t")
         ]  # OUT, INOUT, TABLE
diff --git a/tests/parseutils/test_function_metadata.py b/tests/parseutils/test_function_metadata.py
index c4000ab1c..f6ddb6f2f 100644
--- a/tests/parseutils/test_function_metadata.py
+++ b/tests/parseutils/test_function_metadata.py
@@ -1,4 +1,4 @@
-from pgcli.packages.parseutils.meta import FunctionMetadata
+from pgcli.packages.parseutils.meta import ColumnMetadata, FunctionMetadata
 
 
 def test_function_metadata_eq():
@@ -11,3 +11,22 @@ def test_function_metadata_eq():
     assert not (f1 == f3)
     assert hash(f1) == hash(f2)
     assert hash(f1) != hash(f3)
+
+
+def test_function_metadata_fields_with_variadic_and_no_arg_names():
+    # Issue #1204: labels(variadic text[]) RETURNS hstore has arg_modes but no arg_names.
+    f = FunctionMetadata(
+        "public",
+        "labels",
+        None,  # arg_names: variadic arg has no name
+        ["text[]"],
+        ["v"],  # VARIADIC
+        "hstore",
+        False,
+        False,
+        False,
+        False,
+        None,
+    )
+    # No OUT/INOUT/TABLE columns, so the function name is the output column.
+    assert f.fields() == [ColumnMetadata("labels", "hstore", [])]