diff --git a/CoreBitcoin/BTCScript.m b/CoreBitcoin/BTCScript.m
index 772519f1..46d7ceca 100644
--- a/CoreBitcoin/BTCScript.m
+++ b/CoreBitcoin/BTCScript.m
@@ -1119,7 +1119,7 @@ + (BTCScriptChunk*) parseChunkFromData:(NSData*)scriptData offset:(NSUInteger)of
             if (offset + sizeof(dataLength) > length) return nil;
             
             memcpy(&dataLength, bytes + offset + sizeof(opcode), sizeof(dataLength));
-            dataLength = CFSwapInt16LittleToHost(dataLength);
+            dataLength = CFSwapInt32LittleToHost(dataLength);
             
             NSUInteger chunkLength = sizeof(opcode) + sizeof(dataLength) + dataLength;