diff --git a/src/backend/port/dynloader/aix.c b/src/backend/port/dynloader/aix.c
index a8a833e84fa..61705551430 100644
--- a/src/backend/port/dynloader/aix.c
+++ b/src/backend/port/dynloader/aix.c
@@ -4,6 +4,7 @@
  * 30159 Hannover, Germany
  */
 
+#include <stdio.h>
 #include <errno.h>
 #include <sys/types.h>
 #include "sys/ldr.h"