diff --git a/src/plugin_common/charset.c b/src/plugin_common/charset.c
index d87e32f0..d9812795 100644
--- a/src/plugin_common/charset.c
+++ b/src/plugin_common/charset.c
@@ -20,6 +20,7 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
 
+#include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>