diff --git a/MySQLdb/_exceptions.py b/MySQLdb/_exceptions.py
index ba35deaf..a5aca7e1 100644
--- a/MySQLdb/_exceptions.py
+++ b/MySQLdb/_exceptions.py
@@ -9,32 +9,44 @@
 class MySQLError(Exception):
     """Exception related to operation with MySQL."""
 
+    __module__ = "MySQLdb"
+
 
 class Warning(Warning, MySQLError):
     """Exception raised for important warnings like data truncations
     while inserting, etc."""
 
+    __module__ = "MySQLdb"
+
 
 class Error(MySQLError):
     """Exception that is the base class of all other error exceptions
     (not Warning)."""
 
+    __module__ = "MySQLdb"
+
 
 class InterfaceError(Error):
     """Exception raised for errors that are related to the database
     interface rather than the database itself."""
 
+    __module__ = "MySQLdb"
+
 
 class DatabaseError(Error):
     """Exception raised for errors that are related to the
     database."""
 
+    __module__ = "MySQLdb"
+
 
 class DataError(DatabaseError):
     """Exception raised for errors that are due to problems with the
     processed data like division by zero, numeric value out of range,
     etc."""
 
+    __module__ = "MySQLdb"
+
 
 class OperationalError(DatabaseError):
     """Exception raised for errors that are related to the database's
@@ -43,27 +55,37 @@ class OperationalError(DatabaseError):
     found, a transaction could not be processed, a memory allocation
     error occurred during processing, etc."""
 
+    __module__ = "MySQLdb"
+
 
 class IntegrityError(DatabaseError):
     """Exception raised when the relational integrity of the database
     is affected, e.g. a foreign key check fails, duplicate key,
     etc."""
 
+    __module__ = "MySQLdb"
+
 
 class InternalError(DatabaseError):
     """Exception raised when the database encounters an internal
     error, e.g. the cursor is not valid anymore, the transaction is
     out of sync, etc."""
 
+    __module__ = "MySQLdb"
+
 
 class ProgrammingError(DatabaseError):
     """Exception raised for programming errors, e.g. table not found
     or already exists, syntax error in the SQL statement, wrong number
     of parameters specified, etc."""
 
+    __module__ = "MySQLdb"
+
 
 class NotSupportedError(DatabaseError):
     """Exception raised in case a method or database API was used
     which is not supported by the database, e.g. requesting a
     .rollback() on a connection that does not support transaction or
     has transactions turned off."""
+
+    __module__ = "MySQLdb"