diff --git a/lib/core/settings.py b/lib/core/settings.py
index 66bc20418..104d28df5 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -546,7 +546,7 @@ MAX_HELP_OPTION_LENGTH = 18
 MAX_CONNECT_RETRIES = 100
 
 # Strings for detecting formatting errors
-FORMAT_EXCEPTION_STRINGS = ("Type mismatch", "Error converting", "Failed to convert", "System.FormatException", "java.lang.NumberFormatException")
+FORMAT_EXCEPTION_STRINGS = ("Type mismatch", "Error converting", "Failed to convert", "System.FormatException", "java.lang.NumberFormatException", "ValueError: invalid literal")
 
 # Regular expression used for extracting ASP.NET view state values
 VIEWSTATE_REGEX = r'(?i)(?P<name>__VIEWSTATE[^"]*)[^>]+value="(?P<result>[^"]+)'