diff --git a/debug_toolbar/panels/sql/tracking.py b/debug_toolbar/panels/sql/tracking.py
index 63dbc6906..204cfa13c 100644
--- a/debug_toolbar/panels/sql/tracking.py
+++ b/debug_toolbar/panels/sql/tracking.py
@@ -6,7 +6,7 @@
 from time import time
 
 from django.utils import six
-from django.utils.encoding import force_text
+from django.utils.encoding import force_text, DjangoUnicodeDecodeError
 
 from debug_toolbar import settings as dt_settings
 from debug_toolbar.utils import get_stack, get_template_info, tidy_stacktrace
@@ -84,7 +84,10 @@ def __init__(self, cursor, db, logger):
 
     def _quote_expr(self, element):
         if isinstance(element, six.string_types):
-            return "'%s'" % force_text(element).replace("'", "''")
+            try:
+                return "'%s'" % force_text(element).replace("'", "''")
+            except DjangoUnicodeDecodeError:
+                return repr(element)
         else:
             return repr(element)