diff --git a/releng/manual_devices b/releng/manual_devices
index 546edd52..37175284 100755
--- a/releng/manual_devices
+++ b/releng/manual_devices
@@ -20,6 +20,16 @@ fi
 get_speeds() {
   echo -e "\n${SELF}: Running: ${RELENG_XORRISO} -outdev ${1} -list_speeds"
   ${RELENG_XORRISO} -outdev ${1} -list_speeds
+  RET_SPEEDS="$?"
+  case ${RET_SPEEDS} in
+       0)
+         ;;
+       *)
+         boldify
+         echo -e "\n${SELF}: ${RELENG_XORRISO} -outdev ${1} -list_speeds returned ${RET_SPEEDS}."
+         unboldify
+	 ;;
+  esac
 }
 
 get_devices() {
@@ -47,17 +57,18 @@ get_devices() {
 # main
 echo -e "\n${SELF}: Running: $RELENG_XORRISO -devices..."
 $RELENG_XORRISO -devices
-RET="$?"
-case ${RET} in
+RET_DEVICES="$?"
+case ${RET_DEVICES} in
      0)
-      get_devices
-     ;;
+       get_devices
+       ;;
      *)
-      boldify
-      echo -ne "\n${SELF}: ${RELENG_XORRISO} -devices returned ${RET}."
-      unboldify
-      echo -e  "\n${SELF}: Already mounted?"
-      df -kh
+       boldify
+       echo -ne "\n${SELF}: ${RELENG_XORRISO} -devices returned ${RET_DEVICES}."
+       unboldify
+       echo -e  "\n${SELF}: Already mounted?"
+       df -kh
+       ;;
 esac
 
 exit 0