diff --git a/client/cmdhw.c b/client/cmdhw.c
index 1c2c77a55..72f0b4b2f 100644
--- a/client/cmdhw.c
+++ b/client/cmdhw.c
@@ -309,15 +309,22 @@ static void lookupChipID(uint32_t iChipID, uint32_t mem_used) {
 
 static int CmdDetectReader(const char *Cmd) {
     uint16_t arg = 0;
-    // 'l' means LF - 125/134 kHz
-    if (*Cmd == 'l') {
+    char c = tolower(Cmd[0]);   
+    switch ( c ) {
+        case 'l': 
         arg = 1;
-    } else if (*Cmd == 'h') {
+            break;
+        case 'h':
         arg = 2;
-    } else if (*Cmd != '\0') {
-        PrintAndLogEx(NORMAL, "use 'detectreader' or 'detectreader l' or 'detectreader h'");
+            break;
+        default: {
+            PrintAndLogEx(NORMAL, "use 'detectreader'");
+            PrintAndLogEx(NORMAL, "    'detectreader l'   -- 125/134 kHz");
+            PrintAndLogEx(NORMAL, "    'detectreader h'   -- 13.56 mHz");
         return PM3_EINVARG;
     }
+    }
+    
     clearCommandBuffer();
     SendCommandOLD(CMD_LISTEN_READER_FIELD, arg, 0, 0, NULL, 0);
     return PM3_SUCCESS;