diff --git a/examples/c/test_navcon.cpp b/examples/c/test_navcon.cpp
index e1d39479..e497eed8 100644
--- a/examples/c/test_navcon.cpp
+++ b/examples/c/test_navcon.cpp
@@ -34,6 +34,7 @@
 #include <limits.h>
 
 #include <algorithm>
+#include <cstring>
 
 #include "SDL.h"
 #include "psmove.h"