diff --git a/opm/autodiff/FullyImplicitBlackoilSolver.cpp b/opm/autodiff/FullyImplicitBlackoilSolver.cpp
index f9a477b2b..f2b8a1eef 100644
--- a/opm/autodiff/FullyImplicitBlackoilSolver.cpp
+++ b/opm/autodiff/FullyImplicitBlackoilSolver.cpp
@@ -30,6 +30,7 @@
 #include <opm/core/grid.h>
 #include <opm/core/utility/ErrorMacros.hpp>
 
+#include <cassert>
 
 typedef AutoDiff::ForwardBlock<double> ADB;
 typedef ADB::V V;