diff --git a/common/rfb/ConnParams.cxx b/common/rfb/ConnParams.cxx
index 42134c3..446c3ad 100644
--- a/common/rfb/ConnParams.cxx
+++ b/common/rfb/ConnParams.cxx
@@ -15,6 +15,7 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
  * USA.
  */
+#include <stdio.h>
 #include <rdr/InStream.h>
 #include <rdr/OutStream.h>
 #include <rfb/Exception.h>