devel/syscall-list | 6 +++++-

diff --git a/devel/syscall-list b/devel/syscall-list
index d33a8a78a86e00c4534259125fa2c380323d813c..adb450da27b829be299efb2fbdaa8aafdf8f3b0d 100755
--- a/devel/syscall-list
+++ b/devel/syscall-list
@@ -28,7 +28,10 @@ __DATA__
 #define _GNU_SOURCE
 #include <sys/syscall.h>
 #include <sys/ioctl.h>
+#ifdef __linux__
 #include <linux/fs.h>
+#endif
+#include <sys/types.h>
 #include <unistd.h>
 #include <stdio.h>
 
@@ -60,6 +63,7 @@ #ifdef SYS_renameat2
 	D(SYS_renameat2);
 #endif
 #endif /* Linux, any other OSes with stable syscalls? */
-	printf("size_t=%zu off_t=%zu\n", sizeof(size_t), sizeof(off_t));
+	printf("size_t=%zu off_t=%zu pid_t=%zu\n",
+		 sizeof(size_t), sizeof(off_t), sizeof(pid_t));
 	return 0;
 }