diff --git a/src/rpc/client.cpp b/src/rpc/client.cpp
index 7c1c4c55a..406ad2f6e 100644
--- a/src/rpc/client.cpp
+++ b/src/rpc/client.cpp
@@ -115,7 +115,7 @@ static const CRPCConvertParam vRPCConvertParams[] =
     { "keypoolrefill", 0, "newsize" },
     { "getrawmempool", 0, "verbose" },
     { "estimatefee", 0, "nblocks" },
-    { "estimatesmartfee", 0, "nblocks" },
+    { "estimatesmartfee", 0, "conf_target" },
     { "estimaterawfee", 0, "conf_target" },
     { "estimaterawfee", 1, "threshold" },
     { "prioritisetransaction", 1, "dummy" },