diff --git a/src/common/engine/namedef.h b/src/common/engine/namedef.h
index 37593e692..ef33f4522 100644
--- a/src/common/engine/namedef.h
+++ b/src/common/engine/namedef.h
@@ -154,6 +154,7 @@ xx(stateinfo)
 xx(DamageFunction)
 xx(Length)
 xx(LengthSquared)
+xx(Sum)
 xx(Unit)
 xx(Angle)
 xx(PlusZ)
diff --git a/src/common/engine/sc_man_scanner.re b/src/common/engine/sc_man_scanner.re
index 145abea41..ccaf8fe0b 100644
--- a/src/common/engine/sc_man_scanner.re
+++ b/src/common/engine/sc_man_scanner.re
@@ -202,6 +202,7 @@ std2:
 		'super'						{ RET(ParseVersion >= MakeVersion(1, 0, 0)? TK_Super : TK_Identifier); }
 		'stop'						{ RET(TK_Stop); }
 		'null'						{ RET(TK_Null); }
+		'nullptr'					{ RET(ParseVersion >= MakeVersion(4, 9, 0)? TK_Null : TK_Identifier); }
 
 		'is'						{ RET(ParseVersion >= MakeVersion(1, 0, 0)? TK_Is : TK_Identifier); }
 		'replaces'					{ RET(ParseVersion >= MakeVersion(1, 0, 0)? TK_Replaces : TK_Identifier); }
diff --git a/src/common/scripting/backend/codegen.cpp b/src/common/scripting/backend/codegen.cpp
index fcba6e257..b22a6da88 100644
--- a/src/common/scripting/backend/codegen.cpp
+++ b/src/common/scripting/backend/codegen.cpp
@@ -9365,6 +9365,7 @@ FxExpression *FxVectorBuiltin::Resolve(FCompileContext &ctx)
 		assert(Self->IsVector());
 	case NAME_Length:
 	case NAME_LengthSquared:
+	case NAME_Sum:
 		ValueType = TypeFloat64;
 		break;
 
@@ -9396,6 +9397,23 @@ ExpEmit FxVectorBuiltin::Emit(VMFunctionBuilder *build)
 	{
 		build->Emit(vecSize == 2 ? OP_DOTV2_RR : vecSize == 3 ? OP_DOTV3_RR : OP_DOTV4_RR, to.RegNum, op.RegNum, op.RegNum);
 	}
+	else if (Function == NAME_Sum)
+	{
+		ExpEmit temp(build, ValueType->GetRegType(), 1);
+		build->Emit(OP_FLOP, to.RegNum, op.RegNum, FLOP_ABS);
+		build->Emit(OP_FLOP, temp.RegNum, op.RegNum + 1, FLOP_ABS);
+		build->Emit(OP_ADDF_RR, to.RegNum, to.RegNum, temp.RegNum);
+		if (vecSize > 2)
+		{
+			build->Emit(OP_FLOP, temp.RegNum, op.RegNum + 2, FLOP_ABS);
+			build->Emit(OP_ADDF_RR, to.RegNum, to.RegNum, temp.RegNum);
+		}
+		if (vecSize > 3)
+		{
+			build->Emit(OP_FLOP, temp.RegNum, op.RegNum + 3, FLOP_ABS);
+			build->Emit(OP_ADDF_RR, to.RegNum, to.RegNum, temp.RegNum);
+		}
+	}
 	else if (Function == NAME_Unit)
 	{
 		ExpEmit len(build, REGT_FLOAT);