diff --git a/testssl.sh b/testssl.sh
index 883c267..ef9c747 100755
--- a/testssl.sh
+++ b/testssl.sh
@@ -9405,7 +9405,7 @@ maketempf() {
 }
 
 prepare_debug() {
-     local hexc ossl_ciph ossl_supported_tls="" ossl_supported_sslv2=""
+     local hexc mac ossl_ciph ossl_supported_tls="" ossl_supported_sslv2=""
      if [[ $DEBUG -ne 0 ]]; then
           cat >$TEMPDIR/environment.txt << EOF
 
@@ -9484,7 +9484,7 @@ EOF
      if [[ -e $CIPHERS_BY_STRENGTH_FILE ]]; then
           "$HAS_SSL2" && ossl_supported_sslv2="$($OPENSSL ciphers -ssl2 -V 'ALL:COMPLEMENTOFALL:@STRENGTH' 2>$ERRFILE)"
           ossl_supported_tls="$($OPENSSL ciphers -tls1 -V 'ALL:COMPLEMENTOFALL:@STRENGTH' 2>$ERRFILE)"
-          while read hexc n TLS_CIPHER_OSSL_NAME[TLS_NR_CIPHERS] TLS_CIPHER_RFC_NAME[TLS_NR_CIPHERS] TLS_CIPHER_SSLVERS[TLS_NR_CIPHERS] TLS_CIPHER_KX[TLS_NR_CIPHERS] TLS_CIPHER_AUTH[TLS_NR_CIPHERS] TLS_CIPHER_ENC[TLS_NR_CIPHERS] TLS_CIPHER_EXPORT[TLS_NR_CIPHERS]; do
+          while read hexc n TLS_CIPHER_OSSL_NAME[TLS_NR_CIPHERS] TLS_CIPHER_RFC_NAME[TLS_NR_CIPHERS] TLS_CIPHER_SSLVERS[TLS_NR_CIPHERS] TLS_CIPHER_KX[TLS_NR_CIPHERS] TLS_CIPHER_AUTH[TLS_NR_CIPHERS] TLS_CIPHER_ENC[TLS_NR_CIPHERS] mac TLS_CIPHER_EXPORT[TLS_NR_CIPHERS]; do
                TLS_CIPHER_HEXCODE[TLS_NR_CIPHERS]="$hexc"
                TLS_CIPHER_OSSL_SUPPORTED[TLS_NR_CIPHERS]=false
                if [[ ${#hexc} -eq 9 ]]; then