diff --git a/opm/core/utility/Average.hpp b/opm/core/utility/Average.hpp
index 7e3118e5..1e6affd3 100644
--- a/opm/core/utility/Average.hpp
+++ b/opm/core/utility/Average.hpp
@@ -37,7 +37,6 @@
 #define OPM_AVERAGE_HEADER
 
 
-#include <boost/static_assert.hpp>
 #include <boost/type_traits.hpp>
 #include <cmath>
 
@@ -53,7 +52,7 @@ namespace Opm {
 	{
 	    // To avoid some user errors, we disallow taking averages of
 	    // integral values.
-	    BOOST_STATIC_ASSERT(boost::is_integral<T>::value == false);
+	    static_assert(boost::is_integral<T>::value == false, "");
 	    Tresult retval(t1);
 	    retval += t2;
 	    retval *= 0.5;
@@ -71,7 +70,7 @@ namespace Opm {
 	{
 	    // To avoid some user errors, we disallow taking averages of
 	    // integral values.
-	    BOOST_STATIC_ASSERT(boost::is_integral<T>::value == false);
+	    static_assert(boost::is_integral<T>::value == false, "");
 	    return std::sqrt(t1*t2);
 	}
 
@@ -84,7 +83,7 @@ namespace Opm {
 	{
 	    // To avoid some user errors, we disallow taking averages of
 	    // integral values.
-	    BOOST_STATIC_ASSERT(boost::is_integral<T>::value == false);
+	    static_assert(boost::is_integral<T>::value == false, "");
 	    return (2*t1*t2)/(t1 + t2);
 	}