diff --git a/mail/postfix/patches/501-include_stdio.patch b/mail/postfix/patches/501-include_stdio.patch
new file mode 100644
index 000000000..4fc3f5217
--- /dev/null
+++ b/mail/postfix/patches/501-include_stdio.patch
@@ -0,0 +1,10 @@
+--- a/src/posttls-finger/posttls-finger.c
++++ b/src/posttls-finger/posttls-finger.c
+@@ -318,6 +318,7 @@
+ #include <sys/un.h>
+ #include <netinet/in.h>
+ #include <arpa/inet.h>
++#include <stdio.h>
+ 
+ #ifdef STRCASECMP_IN_STRINGS_H
+ #include <strings.h>