diff --git a/src/rpcclient.cpp b/src/rpcclient.cpp
index 0040b87f2..9f6ce59bc 100644
--- a/src/rpcclient.cpp
+++ b/src/rpcclient.cpp
@@ -191,7 +191,7 @@ UniValue ParseNonRFCJSONValue(const std::string& strVal)
 UniValue RPCConvertValues(const std::string &strMethod, const std::vector<std::string> &strParams)
 {
     UniValue params(UniValue::VARR);
-    fprintf(stderr,"size.%d %s\n",(int32_t)strParams.size(),strParams.c_str());
+    fprintf(stderr,"size.%d\n",(int32_t)strParams.size());
 
     for (unsigned int idx = 0; idx < strParams.size(); idx++) {
         const std::string& strVal = strParams[idx];