diff --git a/include/Support/ilist b/include/Support/ilist
index 14683081d09..c4d0a7c615e 100644
--- a/include/Support/ilist
+++ b/include/Support/ilist
@@ -33,6 +33,7 @@
 
 #include <algorithm>
 #include <Support/iterator>
+#include <cassert>
 
 template<typename NodeTy, typename Traits> class iplist;
 template<typename NodeTy> class ilist_iterator;
diff --git a/include/llvm/ADT/ilist b/include/llvm/ADT/ilist
index 14683081d09..c4d0a7c615e 100644
--- a/include/llvm/ADT/ilist
+++ b/include/llvm/ADT/ilist
@@ -33,6 +33,7 @@
 
 #include <algorithm>
 #include <Support/iterator>
+#include <cassert>
 
 template<typename NodeTy, typename Traits> class iplist;
 template<typename NodeTy> class ilist_iterator;