diff --git a/src/main.cpp b/src/main.cpp
index 4bf25b3..3f7f949 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -21,7 +21,7 @@
 #include "stratum_server.h"
 #include "p2p_server.h"
 
-static void usage()
+void p2pool_usage()
 {
 	printf("P2Pool %s\n"
 		"\nUsage:\n\n" \
@@ -68,13 +68,13 @@ void memory_tracking_stop();
 int main(int argc, char* argv[])
 {
 	if (argc == 1) {
-		usage();
+		p2pool_usage();
 		return 0;
 	}
 
 	for (int i = 1; i < argc; ++i) {
 		if (!strcmp(argv[i], "--help") || !strcmp(argv[i], "/help") || !strcmp(argv[i], "-h") || !strcmp(argv[i], "/h")) {
-			usage();
+			p2pool_usage();
 			return 0;
 		}
 	}
diff --git a/src/params.cpp b/src/params.cpp
index 420c5a4..ac14a98 100644
--- a/src/params.cpp
+++ b/src/params.cpp
@@ -20,86 +20,115 @@
 #include "stratum_server.h"
 #include "p2p_server.h"
 
+void p2pool_usage();
+
 namespace p2pool {
 
 Params::Params(int argc, char* argv[])
 {
 	for (int i = 1; i < argc; ++i) {
+		bool ok = false;
+
 		if ((strcmp(argv[i], "--host") == 0) && (i + 1 < argc)) {
 			m_host = argv[++i];
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--rpc-port") == 0) && (i + 1 < argc)) {
 			m_rpcPort = strtoul(argv[++i], nullptr, 10);
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--zmq-port") == 0) && (i + 1 < argc)) {
 			m_zmqPort = strtoul(argv[++i], nullptr, 10);
+			ok = true;
 		}
 
 		if (strcmp(argv[i], "--light-mode") == 0) {
 			m_lightMode = true;
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--wallet") == 0) && (i + 1 < argc)) {
 			m_wallet.decode(argv[++i]);
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--stratum") == 0) && (i + 1 < argc)) {
 			m_stratumAddresses = argv[++i];
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--p2p") == 0) && (i + 1 < argc)) {
 			m_p2pAddresses = argv[++i];
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--addpeers") == 0) && (i + 1 < argc)) {
 			m_p2pPeerList = argv[++i];
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--loglevel") == 0) && (i + 1 < argc)) {
 			const int level = std::min(std::max<int>(strtol(argv[++i], nullptr, 10), 0), log::MAX_GLOBAL_LOG_LEVEL);
 			log::GLOBAL_LOG_LEVEL = level;
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--config") == 0) && (i + 1 < argc)) {
 			m_config = argv[++i];
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--data-api") == 0) && (i + 1 < argc)) {
 			m_apiPath = argv[++i];
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--local-api") == 0) || (strcmp(argv[i], "--stratum-api") == 0)) {
 			m_localStats = true;
+			ok = true;
 		}
 
 		if (strcmp(argv[i], "--no-cache") == 0) {
 			m_blockCache = false;
+			ok = true;
 		}
 
 		if (strcmp(argv[i], "--no-color") == 0) {
 			log::CONSOLE_COLORS = false;
+			ok = true;
 		}
 
 		if (strcmp(argv[i], "--no-randomx") == 0) {
 			m_disableRandomX = true;
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--out-peers") == 0) && (i + 1 < argc)) {
 			m_maxOutgoingPeers = std::min(std::max(strtoul(argv[++i], nullptr, 10), 10UL), 1000UL);
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--in-peers") == 0) && (i + 1 < argc)) {
 			m_maxIncomingPeers = std::min(std::max(strtoul(argv[++i], nullptr, 10), 10UL), 1000UL);
+			ok = true;
 		}
 
 		if ((strcmp(argv[i], "--start-mining") == 0) && (i + 1 < argc)) {
 			m_minerThreads = std::min(std::max(strtoul(argv[++i], nullptr, 10), 1UL), 64UL);
+			ok = true;
 		}
 
 		if (strcmp(argv[i], "--mini") == 0) {
 			m_mini = true;
+			ok = true;
+		}
+
+		if (!ok) {
+			fprintf(stderr, "Unknown command line parameter %s\n\n", argv[i]);
+			p2pool_usage();
+			panic();
 		}
 	}