diff --git a/BeefLibs/corlib/src/Reflection/AttributeInfo.bf b/BeefLibs/corlib/src/Reflection/AttributeInfo.bf
index 0489904a..5bb5c8ab 100644
--- a/BeefLibs/corlib/src/Reflection/AttributeInfo.bf
+++ b/BeefLibs/corlib/src/Reflection/AttributeInfo.bf
@@ -92,7 +92,7 @@ namespace System.Reflection
 						.Double:
 						let attrData = Decode!<int64>(data);
 						args[argIdx] = scope:AttrBlock box attrData;
-					case (TypeCode)51: //BfConstType_TypeOf
+					case (TypeCode)typeof(TypeCode).MaxValue + 8: //BfConstType_TypeOf
 						let argTypeId = Decode!<int32>(data);
 						args[argIdx] = Type.[Friend]GetType((.)argTypeId);
 					case (TypeCode)255:
diff --git a/BeefLibs/corlib/src/Type.bf b/BeefLibs/corlib/src/Type.bf
index 14ef5228..11aeb50c 100644
--- a/BeefLibs/corlib/src/Type.bf
+++ b/BeefLibs/corlib/src/Type.bf
@@ -686,7 +686,16 @@ namespace System
 	    Struct,
 	    Enum,
 		TypeAlias,
-		Extension
+		Extension,
+		FloatX2,
+		FloatX3,
+		FloatX4,
+		DoubleX2,
+		DoubleX3,
+		DoubleX4,
+		Int64X2,
+		Int64X3,
+		Int64X4,
 	}
 }