diff --git a/src/main.cpp b/src/main.cpp
index 1c72881be0e..a597089f1cb 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1251,7 +1251,7 @@ bool CBlock::ConnectBlock(CTxDB& txdb, CBlockIndex* pindex)
     }
 
     if (vtx[0].GetValueOut() > GetBlockValue(pindex->nHeight, nFees))
-        return error("ConnectBlock() : coinbase pays too much (actual=%"PRI64u" vs limit=%"PRI64u")", vtx[0].GetValueOut(), GetBlockValue(pindex->nHeight, nFees));
+        return error("ConnectBlock() : coinbase pays too much (actual=%"PRI64d" vs limit=%"PRI64d")", vtx[0].GetValueOut(), GetBlockValue(pindex->nHeight, nFees));
 
     // Update block index on disk without changing it in memory.
     // The memory index structure will be changed after the db commits.