diff --git a/IDEHelper/Compiler/BfModule.cpp b/IDEHelper/Compiler/BfModule.cpp
index 3098c140..00df31c4 100644
--- a/IDEHelper/Compiler/BfModule.cpp
+++ b/IDEHelper/Compiler/BfModule.cpp
@@ -21983,7 +21983,7 @@ void BfModule::ProcessMethod(BfMethodInstance* methodInstance, bool isInlineDup,
 				if ((methodDef->mIsMutating) || (methodInstance->mCallingConvention == BfCallingConvention_Cdecl))
 					argIdx++;
 			}
-			else if (!paramVar->mResolvedType->IsValuelessType())
+			else if (!paramVar->mResolvedType->IsValuelessNonOpaqueType())
 			{
 				argIdx++;
 			}
diff --git a/IDEHelper/Tests/src/Opaques.bf b/IDEHelper/Tests/src/Opaques.bf
index 885aac88..9bf64ad1 100644
--- a/IDEHelper/Tests/src/Opaques.bf
+++ b/IDEHelper/Tests/src/Opaques.bf
@@ -20,6 +20,8 @@ class Opaques
 		saPtr.mB += addB;
 	}
 
+	static int Method1(StructB sb, void* ptr) => 0;
+
 	[Test]
 	public static void TestBasics()
 	{
@@ -28,5 +30,7 @@ class Opaques
 		sb.Modify(1000, 2000);
 		Test.Assert(sa.mA == 1123);
 		Test.Assert(sa.mB == 2234);
+
+		Method1(default, default);
 	}
 }
\ No newline at end of file