diff --git a/doc/release-notes-28113.md b/doc/release-notes-28113.md
index c1a3a07b175..c9f418dbbbd 100644
--- a/doc/release-notes-28113.md
+++ b/doc/release-notes-28113.md
@@ -2,6 +2,6 @@ RPC Wallet
 ----------
 
 - The `signrawtransactionwithkey`, `signrawtransactionwithwallet`,
-  `walletprocesspsbt` and `descriptorprocesspsbt` calls now return more
-  specific RPC_INVALID_PARAMETER instead of RPC_PARSE_ERROR if their
-  sighashtype argument is malformed or not a string.
+  `walletprocesspsbt` and `descriptorprocesspsbt` calls now return the more
+  specific RPC_INVALID_PARAMETER error instead of RPC_MISC_ERROR if their
+  sighashtype argument is malformed.
diff --git a/src/rpc/util.cpp b/src/rpc/util.cpp
index 377181dd815..faae840d40f 100644
--- a/src/rpc/util.cpp
+++ b/src/rpc/util.cpp
@@ -313,14 +313,16 @@ UniValue DescribeAddress(const CTxDestination& dest)
     return std::visit(DescribeAddressVisitor(), dest);
 }
 
+/**
+ * Returns a sighash value corresponding to the passed in argument.
+ *
+ * @pre The sighash argument should be string or null.
+*/
 int ParseSighashString(const UniValue& sighash)
 {
     if (sighash.isNull()) {
         return SIGHASH_DEFAULT;
     }
-    if (!sighash.isStr()) {
-        throw JSONRPCError(RPC_INVALID_PARAMETER, "sighash needs to be null or string");
-    }
     const auto result{SighashFromStr(sighash.get_str())};
     if (!result) {
         throw JSONRPCError(RPC_INVALID_PARAMETER, util::ErrorString(result).original);
diff --git a/src/test/fuzz/parse_univalue.cpp b/src/test/fuzz/parse_univalue.cpp
index c9096d0386d..a3d6ab63752 100644
--- a/src/test/fuzz/parse_univalue.cpp
+++ b/src/test/fuzz/parse_univalue.cpp
@@ -67,7 +67,7 @@ FUZZ_TARGET(parse_univalue, .init = initialize_parse_univalue)
     } catch (const std::runtime_error&) {
     }
     try {
-        (void)ParseSighashString(univalue);
+        if (univalue.isNull() || univalue.isStr()) (void)ParseSighashString(univalue);
     } catch (const UniValue&) {
     }
     try {