diff --git a/src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsPositionDecoder.tjava b/src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsPositionDecoder.tjava
index dabdee9..b4a52b5 100644
--- a/src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsPositionDecoder.tjava
+++ b/src/main/tjava/com/r35157/libs/jupiter/perps/impl/anchoridl/AnchorIdlJupiterPerpsPositionDecoder.tjava
@@ -47,7 +47,14 @@ class AnchorIdlJupiterPerpsPositionDecoder {
                 .valueOf(rawCollateralUsd)
                 .movePointLeft(6);
 
-        ΩUSDCAmountΩ sizeUsd = BigDecimal.ZERO;
+        long rawSizeUsd = ByteBuffer
+                .wrap(data, SIZE_USD_OFFSET, U64_LENGTH)
+                .order(ByteOrder.LITTLE_ENDIAN)
+                .getLong();
+
+        ΩUSDCAmountΩ sizeUsd = BigDecimal
+                .valueOf(rawSizeUsd)
+                .movePointLeft(6);
 
         JupiterPerpsPosition pos = new JupiterPerpsPosition(
                 positionAccount,