diff --git a/src/rpcblockchain.cpp b/src/rpcblockchain.cpp
index a7bd01171..b9242b712 100644
--- a/src/rpcblockchain.cpp
+++ b/src/rpcblockchain.cpp
@@ -581,8 +581,8 @@ Value paxpending(const Array& params, bool fHelp)
 
 Value paxprice(const Array& params, bool fHelp)
 {
-    if ( fHelp || params.size() < 3 || params.size() > 4 )
-        throw runtime_error("paxprice \"base\" \"rel\" height amount\n");
+    if ( fHelp || params.size() > 3 || params.size() < 2 )
+        throw runtime_error("paxprice \"base\" \"rel\" height\n");
     LOCK(cs_main);
     Object ret; uint64_t basevolume=0,relvolume,seed;
     std::string base = params[0].get_str();