diff --git a/loopy/kernel/instruction.py b/loopy/kernel/instruction.py
index 68099ce2e..198b7c03f 100644
--- a/loopy/kernel/instruction.py
+++ b/loopy/kernel/instruction.py
@@ -307,8 +307,6 @@ def __init__(self, id, depends_on, depends_on_is_final,
                 # The Taggable constructor call does extra validation.
                 tags=tags)
 
-        Taggable.__init__(self, tags)
-
     # {{{ abstract interface
 
     def read_dependency_names(self):
diff --git a/loopy/symbolic.py b/loopy/symbolic.py
index ebc784b8e..d56b54e79 100644
--- a/loopy/symbolic.py
+++ b/loopy/symbolic.py
@@ -701,7 +701,7 @@ def __init__(self, name, tags):
         assert isinstance(tags, frozenset)
         assert tags
 
-        Taggable.__init__(self, tags)
+        self.tags = tags
 
     def __getinitargs__(self):
         return self.name, self.tags