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-rw-r--r--src/rpcmining.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/rpcmining.cpp b/src/rpcmining.cpp
index 76d90a3f7e..8637df660f 100644
--- a/src/rpcmining.cpp
+++ b/src/rpcmining.cpp
@@ -398,7 +398,7 @@ UniValue getblocktemplate(const UniValue& params, bool fHelp)
if (strMode == "proposal")
{
const UniValue& dataval = find_value(oparam, "data");
- if (dataval.isStr())
+ if (!dataval.isStr())
throw JSONRPCError(RPC_TYPE_ERROR, "Missing data String key for proposal");
CBlock block;