diff --git a/src/miner.cpp b/src/miner.cpp
index 4b7d09252..5903dd825 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -1187,7 +1187,9 @@ void static BitcoinMiner()
             delete minerThreads;
             minerThreads = NULL;
         }
-        
+        fprintf(stderr,"nThreads.%d fGenerate.%d\n",(int32_t)nThreads,fGenerate);
+        if ( nThreads == 0 )
+            nThreads = 1;
         if (nThreads == 0 || !fGenerate)
             return;