diff --git a/DataStructures/DynamicGraph.h b/DataStructures/DynamicGraph.h
index 537ec3d65..5e485546e 100644
--- a/DataStructures/DynamicGraph.h
+++ b/DataStructures/DynamicGraph.h
@@ -23,6 +23,7 @@ or see http://www.gnu.org/licenses/agpl.txt.
 
 #include "../DataStructures/DeallocatingVector.h"
 
+#include <boost/assert.hpp>
 #include <boost/integer.hpp>
 
 #include <algorithm>