diff --git a/examples/encoder.cc b/examples/encoder.cc
index c26c8fc216..143a868182 100644
--- a/examples/encoder.cc
+++ b/examples/encoder.cc
@@ -21,6 +21,8 @@
 #include "config.h"
 #endif
 
+#include <stdlib.h>
+
 #if defined(HAVE_STRINGS_H)
 #include <strings.h>
 #endif