@@ -, +, @@ 
 db
-u C /dev/sda` on ST3500514NS.
---
 hddtemp/src/hddtemp.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
--- hddtemp/src/hddtemp.c	
+++ hddtemp/src/hddtemp.c	
@@ -92,13 +92,17 @@ static void init_bus_types() {
  *******************************************************/
 
 int value_to_unit(struct disk *dsk) {
+  unsigned char dsk_unit = 'C';
+
+  if (dsk->db_entry)
+    dsk_unit = dsk->db_entry->unit;
   switch(unit) {
   case CELSIUS:
-    if(dsk->db_entry->unit == 'F')
+    if(dsk_unit == 'F')
       return F_to_C(dsk->value);
     break;
   case FAHRENHEIT:
-    if(dsk->db_entry->unit == 'C')
+    if(dsk_unit == 'C')
       return C_to_F(dsk->value);
   default:
     break;
--