diff --git a/cachalot/utils.py b/cachalot/utils.py
index 7ab99be..35cebcf 100644
--- a/cachalot/utils.py
+++ b/cachalot/utils.py
@@ -103,7 +103,7 @@ def _find_subqueries_in_where(children):
                 yield grand_child
         elif child_class is ExtraWhere:
             raise IsRawQuery
-        elif child_class is NothingNode:
+        elif child_class in (NothingNode, Subquery, Exists):
             pass
         else:
             rhs = child.rhs
@@ -112,11 +112,6 @@ def _find_subqueries_in_where(children):
                 yield rhs
             elif rhs_class is QuerySet:
                 yield rhs.query
-            elif rhs_class is Subquery or rhs_class is Exists:
-                try:
-                    yield rhs.query
-                except:
-                    yield rhs.queryset.query
             elif rhs_class in UNCACHABLE_FUNCS:
                 raise UncachableQuery