diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
index 790ba1e73..58534d854 100644
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -1091,7 +1091,7 @@ uint256 GetOutputsHash(const CTransaction& txTo) {
 }
 
 uint256 GetJoinSplitsHash(const CTransaction& txTo) {
-    CBLAKE2bWriter ss(SER_GETHASH, 0, ZCASH_JOINSPLITS_HASH_PERSONALIZATION);
+    CBLAKE2bWriter ss(SER_GETHASH, static_cast<int>(txTo.GetHeader()), ZCASH_JOINSPLITS_HASH_PERSONALIZATION);
     for (unsigned int n = 0; n < txTo.vjoinsplit.size(); n++) {
         ss << txTo.vjoinsplit[n];
     }
@@ -1165,7 +1165,7 @@ uint256 SignatureHash(
         memcpy(personalization, "ZcashSigHash", 12);
         memcpy(personalization+12, &leConsensusBranchId, 4);
 
-        CBLAKE2bWriter ss(SER_GETHASH, static_cast<int>(txTo.GetHeader()), personalization);
+        CBLAKE2bWriter ss(SER_GETHASH, 0, personalization);
         // Header
         ss << txTo.GetHeader();
         // Version group ID