diff --git a/indexer/packages/v4-protos/src/codegen/dydxprotocol/subaccounts/streaming.ts b/indexer/packages/v4-protos/src/codegen/dydxprotocol/subaccounts/streaming.ts
index fd54ef914b..ce7dc7b83c 100644
--- a/indexer/packages/v4-protos/src/codegen/dydxprotocol/subaccounts/streaming.ts
+++ b/indexer/packages/v4-protos/src/codegen/dydxprotocol/subaccounts/streaming.ts
@@ -59,7 +59,7 @@ export interface StreamSubaccountUpdateSDKType {
 export interface SubaccountPerpetualPosition {
   /** The `Id` of the `Perpetual`. */
   perpetualId: number;
-  /** The size of the position in base quantums. */
+  /** The size of the position in base quantums. Negative means short. */
 
   quantums: Long;
 }
@@ -71,7 +71,7 @@ export interface SubaccountPerpetualPosition {
 export interface SubaccountPerpetualPositionSDKType {
   /** The `Id` of the `Perpetual`. */
   perpetual_id: number;
-  /** The size of the position in base quantums. */
+  /** The size of the position in base quantums. Negative means short. */
 
   quantums: Long;
 }
@@ -178,7 +178,7 @@ export const StreamSubaccountUpdate = {
 function createBaseSubaccountPerpetualPosition(): SubaccountPerpetualPosition {
   return {
     perpetualId: 0,
-    quantums: Long.UZERO
+    quantums: Long.ZERO
   };
 }
 
@@ -189,7 +189,7 @@ export const SubaccountPerpetualPosition = {
     }
 
     if (!message.quantums.isZero()) {
-      writer.uint32(16).uint64(message.quantums);
+      writer.uint32(16).int64(message.quantums);
     }
 
     return writer;
@@ -209,7 +209,7 @@ export const SubaccountPerpetualPosition = {
           break;
 
         case 2:
-          message.quantums = (reader.uint64() as Long);
+          message.quantums = (reader.int64() as Long);
           break;
 
         default:
@@ -224,7 +224,7 @@ export const SubaccountPerpetualPosition = {
   fromPartial(object: DeepPartial<SubaccountPerpetualPosition>): SubaccountPerpetualPosition {
     const message = createBaseSubaccountPerpetualPosition();
     message.perpetualId = object.perpetualId ?? 0;
-    message.quantums = object.quantums !== undefined && object.quantums !== null ? Long.fromValue(object.quantums) : Long.UZERO;
+    message.quantums = object.quantums !== undefined && object.quantums !== null ? Long.fromValue(object.quantums) : Long.ZERO;
     return message;
   }
 
diff --git a/proto/dydxprotocol/subaccounts/streaming.proto b/proto/dydxprotocol/subaccounts/streaming.proto
index 13b71ee1ae..9351391008 100644
--- a/proto/dydxprotocol/subaccounts/streaming.proto
+++ b/proto/dydxprotocol/subaccounts/streaming.proto
@@ -28,8 +28,8 @@ message StreamSubaccountUpdate {
 message SubaccountPerpetualPosition {
   // The `Id` of the `Perpetual`.
   uint32 perpetual_id = 1;
-  // The size of the position in base quantums.
-  uint64 quantums = 2;
+  // The size of the position in base quantums. Negative means short.
+  int64 quantums = 2;
 }
 
 // SubaccountAssetPosition provides information on a subaccount's updated asset
diff --git a/protocol/x/subaccounts/keeper/subaccount.go b/protocol/x/subaccounts/keeper/subaccount.go
index 52d4c05bb3..a047d9e2c9 100644
--- a/protocol/x/subaccounts/keeper/subaccount.go
+++ b/protocol/x/subaccounts/keeper/subaccount.go
@@ -150,7 +150,7 @@ func (k Keeper) GetStreamSubaccountUpdate(
 	for i, pp := range subaccount.PerpetualPositions {
 		perpetualPositions[i] = &types.SubaccountPerpetualPosition{
 			PerpetualId: pp.PerpetualId,
-			Quantums:    pp.Quantums.BigInt().Uint64(),
+			Quantums:    pp.Quantums.BigInt().Int64(),
 		}
 	}
 
@@ -298,7 +298,7 @@ func GenerateStreamSubaccountUpdate(
 	for i, pp := range updatedPerpetualPositions {
 		perpetualPositions[i] = &types.SubaccountPerpetualPosition{
 			PerpetualId: pp.PerpetualId,
-			Quantums:    pp.Quantums.BigInt().Uint64(),
+			Quantums:    pp.Quantums.BigInt().Int64(),
 		}
 	}
 
diff --git a/protocol/x/subaccounts/types/streaming.pb.go b/protocol/x/subaccounts/types/streaming.pb.go
index 2babfbf862..68f50b9668 100644
--- a/protocol/x/subaccounts/types/streaming.pb.go
+++ b/protocol/x/subaccounts/types/streaming.pb.go
@@ -106,8 +106,8 @@ func (m *StreamSubaccountUpdate) GetSnapshot() bool {
 type SubaccountPerpetualPosition struct {
 	// The `Id` of the `Perpetual`.
 	PerpetualId uint32 `protobuf:"varint,1,opt,name=perpetual_id,json=perpetualId,proto3" json:"perpetual_id,omitempty"`
-	// The size of the position in base quantums.
-	Quantums uint64 `protobuf:"varint,2,opt,name=quantums,proto3" json:"quantums,omitempty"`
+	// The size of the position in base quantums. Negative means short.
+	Quantums int64 `protobuf:"varint,2,opt,name=quantums,proto3" json:"quantums,omitempty"`
 }
 
 func (m *SubaccountPerpetualPosition) Reset()         { *m = SubaccountPerpetualPosition{} }
@@ -150,7 +150,7 @@ func (m *SubaccountPerpetualPosition) GetPerpetualId() uint32 {
 	return 0
 }
 
-func (m *SubaccountPerpetualPosition) GetQuantums() uint64 {
+func (m *SubaccountPerpetualPosition) GetQuantums() int64 {
 	if m != nil {
 		return m.Quantums
 	}
@@ -224,30 +224,30 @@ func init() {
 }
 
 var fileDescriptor_e6cf3092946c3c13 = []byte{
-	// 353 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x92, 0xc1, 0x6a, 0xea, 0x40,
-	0x14, 0x86, 0x1d, 0x95, 0x7b, 0x65, 0xd4, 0xcd, 0xc0, 0xbd, 0x46, 0x85, 0x60, 0x5d, 0x94, 0x74,
-	0xd1, 0x84, 0xda, 0x76, 0xd9, 0x45, 0xbb, 0x93, 0x6e, 0x24, 0x52, 0x0a, 0xa5, 0x20, 0x63, 0x26,
-	0xe8, 0x80, 0x66, 0xa6, 0x9e, 0x99, 0xa2, 0x6f, 0xd1, 0xc7, 0xea, 0xd2, 0x65, 0x97, 0xc5, 0xbc,
-	0x48, 0x31, 0xc6, 0x31, 0x52, 0x14, 0x77, 0xf9, 0xcf, 0x7f, 0xce, 0xf7, 0x67, 0x0e, 0x07, 0x3b,
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-	0x3d, 0x49, 0x46, 0x55, 0x48, 0x1e, 0x71, 0x75, 0xd7, 0x3e, 0xe0, 0xcc, 0x42, 0x2d, 0xe4, 0x94,
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-	0x04, 0xcb, 0x06, 0x32, 0x9c, 0xc9, 0x50, 0x69, 0x3a, 0x19, 0x48, 0x01, 0x5c, 0x71, 0x11, 0x81,
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-	0x4a, 0xfe, 0xe5, 0x00, 0xe1, 0xb8, 0xb6, 0x8d, 0xa5, 0x00, 0xa1, 0xca, 0x44, 0x16, 0x92, 0xc8,
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-	0xbf, 0x69, 0x1a, 0x29, 0x3d, 0x5d, 0x2f, 0x0b, 0x39, 0x45, 0xdf, 0xe8, 0x76, 0x0f, 0xd7, 0x0e,
-	0xfc, 0x2b, 0xa9, 0xe3, 0xd2, 0xe6, 0xdd, 0x86, 0xfa, 0x37, 0xd1, 0xc7, 0x89, 0x0f, 0xcf, 0x9f,
-	0x2b, 0x1b, 0x2d, 0x57, 0x36, 0xfa, 0x5e, 0xd9, 0xe8, 0x23, 0xb6, 0x73, 0xcb, 0xd8, 0xce, 0x7d,
-	0xc5, 0x76, 0xee, 0xe5, 0x6e, 0xc4, 0xd5, 0x58, 0x0f, 0xdd, 0x40, 0x4c, 0xbd, 0xbd, 0x2b, 0x7b,
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-	0x00,
+	// 354 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x92, 0xc1, 0x4e, 0xc2, 0x40,
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+	0xf6, 0x7e, 0x73, 0xe9, 0x8f, 0x09, 0x0b, 0x5d, 0x5d, 0x99, 0xef, 0x5c, 0x9e, 0x5c, 0x88, 0x00,
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+	0x00, 0x00,
 }
 
 func (m *StreamSubaccountUpdate) Marshal() (dAtA []byte, err error) {
@@ -700,7 +700,7 @@ func (m *SubaccountPerpetualPosition) Unmarshal(dAtA []byte) error {
 				}
 				b := dAtA[iNdEx]
 				iNdEx++
-				m.Quantums |= uint64(b&0x7F) << shift
+				m.Quantums |= int64(b&0x7F) << shift
 				if b < 0x80 {
 					break
 				}