diff --git a/vpnor/test/toc_flags.cpp b/vpnor/test/toc_flags.cpp
index b32b6c2..13bd016 100644
--- a/vpnor/test/toc_flags.cpp
+++ b/vpnor/test/toc_flags.cpp
@@ -5,7 +5,7 @@
 
 #include "vpnor/pnor_partition_table.hpp"
 
-#include <assert.h>
+#include <cassert>
 
 #include "common.h"
 #include "vpnor/pnor_partition_defs.h"