diff --git a/NEWS b/NEWS
index faf9bebe..ddefe38d 100644
--- a/NEWS
+++ b/NEWS
@@ -5,7 +5,9 @@ Glances Version 2
 Version 2.7
 ===========
 
-    * ...
+Bugs corrected:
+
+    *  Crash on launch when viewing temperature of laptop HDD in sleep mode (issue #824)
 
 Version 2.6.1
 =============
diff --git a/glances/plugins/glances_hddtemp.py b/glances/plugins/glances_hddtemp.py
index 8a1347c4..9c117497 100644
--- a/glances/plugins/glances_hddtemp.py
+++ b/glances/plugins/glances_hddtemp.py
@@ -21,6 +21,7 @@
 
 import os
 import socket
+import numbers
 
 from glances.compat import nativestr, range
 from glances.logger import logger
@@ -119,7 +120,8 @@ class GlancesGrabHDDTemp(object):
             temperature = fields[offset + 3]
             unit = nativestr(fields[offset + 4])
             hddtemp_current['label'] = device
-            hddtemp_current['value'] = float(temperature) if temperature != b'ERR' else temperature
+            # Temperature could be 'ERR' or 'SLP' (see issue#824)
+            hddtemp_current['value'] = float(temperature) if isinstance(temperature, numbers.Number) else temperature
             hddtemp_current['unit'] = unit
             self.hddtemp_list.append(hddtemp_current)