diff --git a/main.cpp b/main.cpp
index 8e32ee7c3c..1f5261d4e9 100644
--- a/main.cpp
+++ b/main.cpp
@@ -3197,7 +3197,7 @@ void BitcoinMiner()
             while (!mapPriority.empty())
             {
                 // Take highest priority transaction off priority queue
-                double dPriority = (*mapPriority.begin()).first;
+                double dPriority = -(*mapPriority.begin()).first;
                 CTransaction& tx = *(*mapPriority.begin()).second;
                 mapPriority.erase(mapPriority.begin());
 
diff --git a/serialize.h b/serialize.h
index 0fc3366c74..e0b83aca43 100644
--- a/serialize.h
+++ b/serialize.h
@@ -22,7 +22,7 @@ class CDataStream;
 class CAutoFile;
 static const unsigned int MAX_SIZE = 0x02000000;
 
-static const int VERSION = 31503;
+static const int VERSION = 31504;
 static const char* pszSubVer = "";