diff --git a/debug_toolbar/panels/sql/tracking.py b/debug_toolbar/panels/sql/tracking.py
index 63dbc6906..93ffd7ef6 100644
--- a/debug_toolbar/panels/sql/tracking.py
+++ b/debug_toolbar/panels/sql/tracking.py
@@ -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)