diff --git a/SWIG/Examples/php4/simple/example.c b/SWIG/Examples/php4/simple/example.c
index cdbdd4873..2fe275632 100644
--- a/SWIG/Examples/php4/simple/example.c
+++ b/SWIG/Examples/php4/simple/example.c
@@ -1,4 +1,5 @@
 /* File : example.c */
+#include <stdio.h>
 
 /* A global variable */
 double Foo = 3.0;