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-rw-r--r--src/rpcmining.cpp5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/rpcmining.cpp b/src/rpcmining.cpp
index 1a8462fdea..564f0401f1 100644
--- a/src/rpcmining.cpp
+++ b/src/rpcmining.cpp
@@ -55,7 +55,10 @@ void ShutdownRPCMining()
// or from the last difficulty change if 'lookup' is nonpositive.
// If 'height' is nonnegative, compute the estimate at the time when a given block was found.
Value GetNetworkHashPS(int lookup, int height) {
- CBlockIndex *pb = chainActive[height];
+ CBlockIndex *pb = chainActive.Tip();
+
+ if (height >= 0 && height < chainActive.Height())
+ pb = chainActive[height];
if (pb == NULL || !pb->nHeight)
return 0;