diff --git a/ksysguardd/Linux/diskstat.c b/ksysguardd/Linux/diskstat.c
--- a/ksysguardd/Linux/diskstat.c
+++ b/ksysguardd/Linux/diskstat.c
@@ -181,16 +181,18 @@
          * either a dummy file system or a network file system.
          * Add special handling for smbfs and cifs as is done by
          * coreutils as well.
+         *
+         * Explicitely allow tmpfs
          */
-        if ( (mnt_info->mnt_fsname[0] != '/') ||
-             !strcmp( mnt_info->mnt_type, "smbfs" ) ||
-             !strcmp( mnt_info->mnt_type, "cifs" ) ||
-             !strcmp( mnt_info->mnt_type, "proc" ) ||
-             !strcmp( mnt_info->mnt_type, "devfs" ) ||
-             !strcmp( mnt_info->mnt_type, "usbfs" ) ||
-             !strcmp( mnt_info->mnt_type, "sysfs" ) ||
-             !strcmp( mnt_info->mnt_type, "tmpfs" ) ||
-             !strcmp( mnt_info->mnt_type, "devpts" ) )
+        if ( strcmp( mnt_info->mnt_type, "tmpfs" ) && (
+             (mnt_info->mnt_fsname[0] != '/') ||
+              !strcmp( mnt_info->mnt_type, "smbfs" ) ||
+              !strcmp( mnt_info->mnt_type, "cifs" ) ||
+              !strcmp( mnt_info->mnt_type, "proc" ) ||
+              !strcmp( mnt_info->mnt_type, "devfs" ) ||
+              !strcmp( mnt_info->mnt_type, "usbfs" ) ||
+              !strcmp( mnt_info->mnt_type, "sysfs" ) ||
+              !strcmp( mnt_info->mnt_type, "devpts" ) ))
             continue;  /* Skip these file systems */
 
         if ( ( disk_info = (DiskInfo *)malloc( sizeof( DiskInfo ) ) ) == NULL )