diff --git a/CHANGELOG.md b/CHANGELOG.md
index 07a30ae6..71edf5d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,9 @@
 # Unreleased Features
 Please add a note of your changes below this heading if you make a Pull Request.
 
+## Fixed
+* Would ERROR_CONTROL_DEADLINE_MISSED along with every ERROR_PHASE_RESISTANCE_OUT_OF_RANGE.
+
 # Releases
 ## [0.4.6] - 2018-10-07
 ### Fixed
diff --git a/tools/odrive/dfu.py b/tools/odrive/dfu.py
index 6283b81a..9dc5f6d9 100755
--- a/tools/odrive/dfu.py
+++ b/tools/odrive/dfu.py
@@ -338,8 +338,8 @@ def update_device(device, firmware, logger, cancellation_token):
 
     # Back up configuration
     if dfudev is None:
-        did_backup_config = device.user_config_loaded if hasattr(device, 'user_config_loaded') else False
-        if did_backup_config:
+        do_backup_config = device.user_config_loaded if hasattr(device, 'user_config_loaded') else False
+        if do_backup_config:
             odrive.configuration.backup_config(device, None, logger)
     elif not odrive.utils.yes_no_prompt("The configuration cannot be backed up because the device is already in DFU mode. The configuration may be lost after updating. Do you want to continue anyway?", True):
         raise OperationAbortedException()
@@ -414,7 +414,7 @@ def update_device(device, firmware, logger, cancellation_token):
     device = odrive.find_any("usb", serial_number,
                     cancellation_token, cancellation_token, timeout=30)
 
-    if did_backup_config:
+    if do_backup_config:
         odrive.configuration.restore_config(device, None, logger)
         os.remove(odrive.configuration.get_temp_config_filename(device))