diff --git a/examples/pdf-set-form-values.cc b/examples/pdf-set-form-values.cc
index 41e84d88..b0a4f2ad 100644
--- a/examples/pdf-set-form-values.cc
+++ b/examples/pdf-set-form-values.cc
@@ -1,3 +1,5 @@
+#include <stdio.h>
+#include <string.h>
 #include <iostream>
 #include <stdlib.h>
 #include <qpdf/QPDF.hh>