diff --git a/client/cmdhflegic.c b/client/cmdhflegic.c
index db65447ac..8d79e2d2c 100644
--- a/client/cmdhflegic.c
+++ b/client/cmdhflegic.c
@@ -230,21 +230,21 @@ int CmdLegicInfo(const char *Cmd) {
         int fl = 0;
 
         if (data[6] == 0xec) {
-            strncpy(token_type, "XAM", sizeof(token_type));
+            strncpy(token_type, "XAM", sizeof(token_type) - 1);
             fl = 1;
             stamp_len = 0x0c - (data[5] >> 4);
         } else {
             switch (data[5] & 0x7f) {
                 case 0x00 ... 0x2f:
-                    strncpy(token_type, "IAM", sizeof(token_type));
+                    strncpy(token_type, "IAM", sizeof(token_type) - 1);
                     fl = (0x2f - (data[5] & 0x7f)) + 1;
                     break;
                 case 0x30 ... 0x6f:
-                    strncpy(token_type, "SAM", sizeof(token_type));
+                    strncpy(token_type, "SAM", sizeof(token_type) - 1);
                     fl = (0x6f - (data[5] & 0x7f)) + 1;
                     break;
                 case 0x70 ... 0x7f:
-                    strncpy(token_type, "GAM", sizeof(token_type));
+                    strncpy(token_type, "GAM", sizeof(token_type) - 1);
                     fl = (0x7f - (data[5] & 0x7f)) + 1;
                     break;
             }
@@ -266,9 +266,9 @@ int CmdLegicInfo(const char *Cmd) {
 
         if (data[7] == 0x9F && data[8] == 0xFF) {
             bIsSegmented = 1;
-            strncpy(token_type, "IM-S", sizeof(token_type));
+            strncpy(token_type, "IM-S", sizeof(token_type) - 1);
         } else {
-            strncpy(token_type, "IM", sizeof(token_type));
+            strncpy(token_type, "IM", sizeof(token_type) - 1);
         }
 
         PrintAndLogEx(NORMAL, "DCF: %d (%02x %02x), Token Type=%s (OLE=%01u)",