diff --git a/src/Lua/Runtime/LuaVirtualMachine.cs b/src/Lua/Runtime/LuaVirtualMachine.cs
index 6519850d..6b6a2b0b 100644
--- a/src/Lua/Runtime/LuaVirtualMachine.cs
+++ b/src/Lua/Runtime/LuaVirtualMachine.cs
@@ -2666,6 +2666,7 @@ out metamethod
         {
             var RA = context.Instruction.A + context.FrameBase;
             stack.Get(RA) = table.ArrayLength;
+            stack.NotifyTop(RA + 1);
             return true;
         }
 
diff --git a/tests/Lua.Tests/OperatorTests.cs b/tests/Lua.Tests/OperatorTests.cs
index 8e46b88c..de5c54c5 100644
--- a/tests/Lua.Tests/OperatorTests.cs
+++ b/tests/Lua.Tests/OperatorTests.cs
@@ -184,4 +184,24 @@ public async Task Test_GreaterThanOrEquals(double a, double b)
         Assert.That(result, Has.Length.EqualTo(1));
         Assert.That(result[0], Is.EqualTo(new LuaValue(a >= b)));
     }
+
+    [Test]
+    public async Task Test_TableLength()
+    {
+        using var state = LuaState.Create();
+        state.OpenBasicLibrary();
+        var source =
+            @"
+function f1()
+    local c = {}
+    return #c
+end
+function f2(a, b)
+    assert(b == nil)
+end
+f1()
+f2()
+";
+        await state.DoStringAsync(source);
+    }
 }