diff --git a/src/server/poolserver/Stratum/Client.cpp b/src/server/poolserver/Stratum/Client.cpp
index fde4a79..a5c023b 100644
--- a/src/server/poolserver/Stratum/Client.cpp
+++ b/src/server/poolserver/Stratum/Client.cpp
@@ -39,6 +39,9 @@ namespace Stratum
         
         _jobs[jobid] = job;
         
+        std::stringstream jobss;
+        jobss << std::hex << jobid;
+        
         // Build merkle branch array
         JSON merkle_branch(JSON_ARRAY);
         uint64 branches = job.block->merkleBranches;
@@ -57,7 +60,7 @@ namespace Stratum
         prevhashfixed << prevhash[0] << prevhash[1] << prevhash[2] << prevhash[3] << prevhash[4] << prevhash[5] << prevhash[6] << prevhash[7];
         
         JSON params;
-        params.Add(Util::BinToASCII(ByteBuffer(jobid).Binary()));
+        params.Add(jobss.str());
         params.Add(Util::BinToASCII(prevhashfixed.Binary()));
         params.Add(Util::BinToASCII(job.coinbase1));
         params.Add(Util::BinToASCII(job.coinbase2));
@@ -94,8 +97,9 @@ namespace Stratum
         }
         
         uint32 jobid;
-        ByteBuffer jobbuf(Util::ASCIIToBin(params[1].GetString()));
-        jobbuf >> jobid;
+        std::stringstream jobss;
+        jobss << std::hex << params[1].GetString();
+        jobss >> jobid;
         
         // Check if such job exists
         if (!_jobs.count(jobid)) {
diff --git a/src/server/shared/Util.cpp b/src/server/shared/Util.cpp
index 24d8f73..afe0e76 100644
--- a/src/server/shared/Util.cpp
+++ b/src/server/shared/Util.cpp
@@ -86,7 +86,7 @@ uint8 Util::ASCIIToHex(char ch)
 BinaryData Util::ASCIIToBin(std::string str)
 {
     BinaryData data;
-    data.resize(str.size()/2, 0);
+    data.resize((str.size()+1)/2, 0);
     for (uint64 i = 0; i < str.size(); ++i) {
         if (i%2)
             data[i/2] += ASCIIToHex(str[i]);