diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index b4b160aac..f9bd81cfb 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -1325,7 +1325,7 @@ UniValue getmempoolinfo(const JSONRPCRequest& request)
             "  \"bytes\": xxxxx,              (numeric) Sum of all virtual transaction sizes as defined in BIP 141. Differs from actual serialized size because witness data is discounted\n"
             "  \"usage\": xxxxx,              (numeric) Total memory usage for the mempool\n"
             "  \"maxmempool\": xxxxx,         (numeric) Maximum memory usage for the mempool\n"
-            "  \"mempoolminfee\": xxxxx       (numeric) Minimum fee for tx to be accepted\n"
+            "  \"mempoolminfee\": xxxxx       (numeric) Minimum feerate (" + CURRENCY_UNIT + " per KB) for tx to be accepted\n"
             "}\n"
             "\nExamples:\n"
             + HelpExampleCli("getmempoolinfo", "")