diff --git a/client/src/cmdhfmfu.c b/client/src/cmdhfmfu.c
index 7ff381d22..47ab3a997 100644
--- a/client/src/cmdhfmfu.c
+++ b/client/src/cmdhfmfu.c
@@ -607,7 +607,7 @@ static int ndef_print_CC(uint8_t *data) {
     uint8_t mbread = (data[3] & 0x01);
 
     PrintAndLogEx(SUCCESS, "  %02X: Additional feature information", data[3]);    
-    PrintAndLogEx(SUCCESS, "  00000000");
+    PrintAndLogEx(SUCCESS, "  %s", sprint_bin(&data[3], 1));
     PrintAndLogEx(SUCCESS, "  xxx..... - %02X: RFU ( %s )", msb3, (msb3 == 0) ? _GREEN_("ok") : _RED_("fail"));
     PrintAndLogEx(SUCCESS, "  ...x.... - %02X: %s special frame", sf, (sf) ? "support" : "don\'t support");
     PrintAndLogEx(SUCCESS, "  ....x... - %02X: %s lock block", lb, (lb) ? "support" : "don\'t support");
diff --git a/client/src/cmdhftopaz.c b/client/src/cmdhftopaz.c
index 6d7a1975d..805d891d8 100644
--- a/client/src/cmdhftopaz.c
+++ b/client/src/cmdhftopaz.c
@@ -391,7 +391,7 @@ static int topaz_print_CC(uint8_t *data) {
 
     PrintAndLogEx(SUCCESS, "  %02X: Additional feature information", data[3]);
     PrintAndLogEx(SUCCESS, "  ^^");
-    PrintAndLogEx(SUCCESS, "  00000000");
+    PrintAndLogEx(SUCCESS, "  %s", sprint_bin(&data[3], 1));
     PrintAndLogEx(SUCCESS, "  xxx..... - %02X: RFU ( %s )", msb3, (msb3 == 0) ? _GREEN_("ok") : _RED_("fail"));
     PrintAndLogEx(SUCCESS, "  ...x.... - %02X: %s special frame", sf, (sf) ? "support" : "don\'t support");
     PrintAndLogEx(SUCCESS, "  ....x... - %02X: %s lock block", lb, (lb) ? "support" : "don\'t support");
diff --git a/client/src/util.c b/client/src/util.c
index 57e213feb..e849ebb62 100644
--- a/client/src/util.c
+++ b/client/src/util.c
@@ -404,6 +404,8 @@ char *sprint_bytebits_bin_break(const uint8_t *data, const size_t len, const uin
 
     // 3072 + end of line characters if broken at 8 bits
     static char buf[MAX_BIN_BREAK_LENGTH] = {0};
+    memset(buf, 0, sizeof(buf));
+
     char *tmp = buf;
 
     // loop through the out_index to make sure we don't go too far