--- a/src/mpc.h
+++ b/src/mpc.h
@@ -22,6 +22,7 @@ along with this program. If not, see http://www.gnu.org/licenses/ .
 #define __MPC_H
 
 #include <stdint.h>
+#include <stdio.h>
 #include "gmp.h"
 #include "mpfr.h"
 
