diff --git a/src/c/ecl_features.h b/src/c/ecl_features.h
index 6951de6c3..5798426e5 100644
--- a/src/c/ecl_features.h
+++ b/src/c/ecl_features.h
@@ -111,6 +111,11 @@ ecl_def_string_array(feature_names,static,const) = {
 #endif
 #ifdef ECL_RWLOCK
 	ecl_def_string_array_elt("ECL-READ-WRITE-LOCK"),
+#endif
+#ifdef WORDS_BIGENDIAN
+	ecl_def_string_array_elt("BIG-ENDIAN"),
+#else
+	ecl_def_string_array_elt("LITTLE-ENDIAN"),
 #endif
         ecl_def_string_array_elt(0)
 };