diff --git a/examples/ggwave-cli/main.cpp b/examples/ggwave-cli/main.cpp
index 8ad03dc..88cff63 100644
--- a/examples/ggwave-cli/main.cpp
+++ b/examples/ggwave-cli/main.cpp
@@ -14,11 +14,7 @@ int main(int argc, char** argv) {
     printf("Usage: %s [-cN] [-pN] [-tN]\n", argv[0]);
     printf("    -cN - select capture device N\n");
     printf("    -pN - select playback device N\n");
-    printf("    -tN - transmission protocol:\n");
-    printf("          -t0 : Normal\n");
-    printf("          -t1 : Fast (default)\n");
-    printf("          -t2 : Fastest\n");
-    printf("          -t3 : Ultrasonic\n");
+    printf("    -tN - transmission protocol\n");
     printf("\n");
 
     auto argm = parseCmdArguments(argc, argv);
@@ -33,6 +29,16 @@ int main(int argc, char** argv) {
 
     auto ggWave = GGWave_instance();
 
+    printf("Available Tx protocols:\n");
+    for (int i = 0; i < (int) ggWave->getTxProtocols().size(); ++i) {
+        printf("    -t%d : %s\n", i, ggWave->getTxProtocols()[i].name);
+    }
+
+    if (txProtocol < 0 || txProtocol > (int) ggWave->getTxProtocols().size()) {
+        fprintf(stderr, "Unknown Tx protocol %d\n", txProtocol);
+        return -3;
+    }
+
     printf("Selecting Tx protocol %d\n", txProtocol);
 
     std::mutex mutex;
diff --git a/examples/ggwave-gui/main.cpp b/examples/ggwave-gui/main.cpp
index 2df3cf4..3c48d49 100644
--- a/examples/ggwave-gui/main.cpp
+++ b/examples/ggwave-gui/main.cpp
@@ -50,17 +50,11 @@ int main(int argc, char** argv) {
     printf("Usage: %s [-cN] [-pN] [-tN]\n", argv[0]);
     printf("    -cN - select capture device N\n");
     printf("    -pN - select playback device N\n");
-    printf("    -tN - transmission protocol:\n");
-    printf("          -t0 : Normal\n");
-    printf("          -t1 : Fast (default)\n");
-    printf("          -t2 : Fastest\n");
-    printf("          -t3 : Ultrasonic\n");
     printf("\n");
 
     auto argm = parseCmdArguments(argc, argv);
     int captureId = argm["c"].empty() ? 0 : std::stoi(argm["c"]);
     int playbackId = argm["p"].empty() ? 0 : std::stoi(argm["p"]);
-    int txProtocol = argm["t"].empty() ? 1 : std::stoi(argm["t"]);
 
     if (GGWave_init(playbackId, captureId) == false) {
         fprintf(stderr, "Failed to initialize GGWave\n");