diff --git a/AST/ASTContext.cpp b/AST/ASTContext.cpp
index 740d6e5..899dfde 100644
--- a/AST/ASTContext.cpp
+++ b/AST/ASTContext.cpp
@@ -717,17 +717,14 @@
 /// getTagDeclType - Return the unique reference to the type for the
 /// specified TagDecl (struct/union/class/enum) decl.
 QualType ASTContext::getTagDeclType(TagDecl *Decl) {
-  // FIXME: This method currently accepts "Decl" to be NULL for use
-  //  by the deserializer.  This interface may wished to be changed
-  //  in the future.
-  
+  assert (Decl);
+
   // The decl stores the type cache.
-  if (Decl && Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0);
+  if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0);
   
   TagType* T = new TagType(Decl, QualType());
-  Types.push_back(T);
-  
-  if (Decl) Decl->TypeForDecl = T;
+  Types.push_back(T);  
+  Decl->TypeForDecl = T;
 
   return QualType(T, 0);
 }