diff --git a/armsrc/cmd.c b/armsrc/cmd.c
index 0f68719d4..961be39b1 100644
--- a/armsrc/cmd.c
+++ b/armsrc/cmd.c
@@ -138,7 +138,7 @@ static int reply_ng_internal(uint16_t cmd, int8_t status, uint8_t reason, const
 }
 
 int reply_ng(uint16_t cmd, int8_t status, const uint8_t *data, size_t len) {
-    return reply_ng_internal(cmd, status, -1, data, len, true);
+    return reply_ng_internal(cmd, status, PM3_REASON_UNKNOWN, data, len, true);
 }
 
 int reply_mix(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, const void *data, size_t len) {
@@ -154,7 +154,7 @@ int reply_mix(uint64_t cmd, uint64_t arg0, uint64_t arg1, uint64_t arg2, const v
         memcpy(cmddata + sizeof(arg), data, (int)len);
     }
 
-    return reply_ng_internal((cmd & 0xFFFF), status, -1, cmddata, len + sizeof(arg), false);
+    return reply_ng_internal((cmd & 0xFFFF), status, PM3_REASON_UNKNOWN, cmddata, len + sizeof(arg), false);
 }
 
 int reply_reason(uint16_t cmd, int8_t status, int8_t reason, const uint8_t *data, size_t len) {
diff --git a/client/src/cmdlfhitaghts.c b/client/src/cmdlfhitaghts.c
index 3be9d6739..c4f31a230 100644
--- a/client/src/cmdlfhitaghts.c
+++ b/client/src/cmdlfhitaghts.c
@@ -210,7 +210,8 @@ static void print_error(int8_t reason) {
             PrintAndLogEx(FAILED, "Write to page failed!");
             break;
         default:
-            PrintAndLogEx(DEBUG, "DEBUG: Error - Hitag S failed");
+          // PM3_REASON_UNKNOWN
+          PrintAndLogEx(DEBUG, "DEBUG: Error - Hitag S failed");
     }
 }
 
@@ -237,7 +238,7 @@ static int CmdLFHitagSRead(const char *Cmd) {
         arg_lit0(NULL, "crypto", "crypto mode"),
         arg_str0("k", "key", "<hex>", "pwd or key, 4 or 6 hex bytes"),
         arg_int0("p", "page", "<dec>", "page address to read from"),
-        arg_int0("c", "count", "<dec>", "how many pages to read. '0' reads all pages up to the s page (default: 1)"),
+        arg_int0("c", "count", "<dec>", "how many pages to read. '0' reads all pages up to the end page (default: 1)"),
         arg_param_end
     };
     CLIExecWithReturn(ctx, Cmd, argtable, true);
diff --git a/include/pm3_cmd.h b/include/pm3_cmd.h
index 7d5111327..9ab3bc993 100644
--- a/include/pm3_cmd.h
+++ b/include/pm3_cmd.h
@@ -874,6 +874,8 @@ typedef struct {
 // reserved for future protocol change
 #define PM3_RESERVED         -128
 
+#define PM3_REASON_UNKNOWN     -1
+
 // LF
 #define LF_FREQ2DIV(f) ((int)(((12000.0 + (f)/2.0)/(f))-1))
 #define LF_DIVISOR_125 LF_FREQ2DIV(125)