diff --git a/src/base/net/stratum/Job.cpp b/src/base/net/stratum/Job.cpp
index d429b98e..a8becb1a 100644
--- a/src/base/net/stratum/Job.cpp
+++ b/src/base/net/stratum/Job.cpp
@@ -225,7 +225,7 @@ void xmrig::Job::move(Job &&other)
 
 void xmrig::Job::generateMinerSignature(uint64_t data, uint8_t* sig) const
 {
-    uint8_t sig_data[16];
+    uint8_t sig_data[32];
     int k = sizeof(sig_data);
     do {
         sig_data[--k] = "0123456789"[data % 10];