diff --git a/Source/Mockolate.SourceGenerators/Sources/Sources.MockClass.cs b/Source/Mockolate.SourceGenerators/Sources/Sources.MockClass.cs
index 8047b7a8..0af2658b 100644
--- a/Source/Mockolate.SourceGenerators/Sources/Sources.MockClass.cs
+++ b/Source/Mockolate.SourceGenerators/Sources/Sources.MockClass.cs
@@ -4257,9 +4257,10 @@ private static void AppendMethodSetupImplementation(StringBuilder sb, Method met
 
 		sb.AppendLine();
 		sb.AppendLine("\t\t{");
+		string methodSetupVar = Helpers.GetUniqueLocalVariableName("methodSetup", method.Parameters);
 		if (method.ReturnType != Type.Void)
 		{
-			sb.Append("\t\t\tvar methodSetup = new global::Mockolate.Setup.ReturnMethodSetup<")
+			sb.Append("\t\t\tvar ").Append(methodSetupVar).Append(" = new global::Mockolate.Setup.ReturnMethodSetup<")
 				.AppendTypeOrWrapper(method.ReturnType);
 
 			foreach (MethodParameter parameter in method.Parameters)
@@ -4271,7 +4272,7 @@ private static void AppendMethodSetupImplementation(StringBuilder sb, Method met
 		}
 		else
 		{
-			sb.Append("\t\t\tvar methodSetup = new global::Mockolate.Setup.VoidMethodSetup");
+			sb.Append("\t\t\tvar ").Append(methodSetupVar).Append(" = new global::Mockolate.Setup.VoidMethodSetup");
 
 			if (method.Parameters.Count > 0)
 			{
@@ -4305,8 +4306,8 @@ private static void AppendMethodSetupImplementation(StringBuilder sb, Method met
 
 			sb.Append(");").AppendLine();
 			sb.Append("\t\t\tthis.").Append(mockRegistryName).Append(".SetupMethod(")
-				.Append(memberIdRef).Append(", ").Append(scopePrefix).Append("methodSetup);").AppendLine();
-			sb.Append("\t\t\treturn methodSetup;").AppendLine();
+				.Append(memberIdRef).Append(", ").Append(scopePrefix).Append(methodSetupVar).Append(");").AppendLine();
+			sb.Append("\t\t\treturn ").Append(methodSetupVar).Append(';').AppendLine();
 		}
 		else
 		{
@@ -4330,8 +4331,8 @@ private static void AppendMethodSetupImplementation(StringBuilder sb, Method met
 
 			sb.Append(");").AppendLine();
 			sb.Append("\t\t\tthis.").Append(mockRegistryName).Append(".SetupMethod(")
-				.Append(memberIdRef).Append(", ").Append(scopePrefix).Append("methodSetup);").AppendLine();
-			sb.Append("\t\t\treturn methodSetup;").AppendLine();
+				.Append(memberIdRef).Append(", ").Append(scopePrefix).Append(methodSetupVar).Append(");").AppendLine();
+			sb.Append("\t\t\treturn ").Append(methodSetupVar).Append(';').AppendLine();
 		}
 
 		sb.AppendLine("\t\t}");
diff --git a/Tests/Mockolate.SourceGenerators.Tests/MockTests.ClassTests.MethodTests.cs b/Tests/Mockolate.SourceGenerators.Tests/MockTests.ClassTests.MethodTests.cs
index fd09cc35..73e8e8ac 100644
--- a/Tests/Mockolate.SourceGenerators.Tests/MockTests.ClassTests.MethodTests.cs
+++ b/Tests/Mockolate.SourceGenerators.Tests/MockTests.ClassTests.MethodTests.cs
@@ -443,6 +443,32 @@ public interface IMyService
 				await That(result.Diagnostics).IsEmpty();
 			}
 
+			[Fact]
+			public async Task ParameterNamedSetup_ShouldCompile()
+			{
+				GeneratorResult result = Generator
+					.Run("""
+					     using Mockolate;
+
+					     namespace MyCode;
+
+					     public class Program
+					     {
+					         public static void Main(string[] args)
+					         {
+					     		_ = IMyService.CreateMock();
+					         }
+					     }
+
+					     public interface IMyService
+					     {
+					         void Run(int setup, int methodSetup, int s_methodSetup);
+					     }
+					     """);
+
+				await That(result.Diagnostics).IsEmpty();
+			}
+
 			[Fact]
 			public async Task ShouldImplementAllMethodsFromInterfaces()
 			{