diff --git a/src/main.cpp b/src/main.cpp
index 82b95b146..20354fd59 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -6469,7 +6469,7 @@ bool LoadExternalBlockFile(FILE* fileIn, CDiskBlockPos *dbp)
     try {
         // This takes over fileIn and calls fclose() on it in the CBufferedFile destructor
         //CBufferedFile blkdat(fileIn, 2*MAX_BLOCK_SIZE, MAX_BLOCK_SIZE+8, SER_DISK, CLIENT_VERSION);
-        CBufferedFile blkdat(fileIn, 32*MAX_BLOCK_SIZE(10000000), MAX_BLOCK_SIZE(10000000)+8, SER_DISK, CLIENT_VERSION);
+        CBufferedFile blkdat(fileIn, 2*MAX_BLOCK_SIZE(10000000), MAX_BLOCK_SIZE(10000000)+8, SER_DISK, CLIENT_VERSION);
         uint64_t nRewind = blkdat.GetPos();
         while (!blkdat.eof()) {
             boost::this_thread::interruption_point();