diff --git a/man2/faccessat.2 b/man2/faccessat.2
index 80989f442..81798f128 100644
--- a/man2/faccessat.2
+++ b/man2/faccessat.2
@@ -29,6 +29,7 @@ faccessat \- check user's permissions of a file relative to a \
 directory file descriptor
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <fcntl.h>
 .B #include <unistd.h>
 .sp
diff --git a/man2/fchmodat.2 b/man2/fchmodat.2
index 8e43712a4..88f65ef3f 100644
--- a/man2/fchmodat.2
+++ b/man2/fchmodat.2
@@ -29,6 +29,7 @@ fchmodat \- change permissions of a file relative to a directory \
 file descriptor
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <sys/stat.h>
 .sp
 .BI "int fchmodat(int " dirfd ", const char *" pathname ", mode_t " \
diff --git a/man2/fchownat.2 b/man2/fchownat.2
index 49f30811d..6522afb42 100644
--- a/man2/fchownat.2
+++ b/man2/fchownat.2
@@ -29,6 +29,7 @@ fchownat \- change ownership of a file relative to a directory \
 file descriptor
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <unistd.h>
 .sp
 .BI "int fchownat(int " dirfd ", const char *" pathname , 
diff --git a/man2/fstatat.2 b/man2/fstatat.2
index 75aac1f52..04b23e4e2 100644
--- a/man2/fstatat.2
+++ b/man2/fstatat.2
@@ -28,6 +28,7 @@
 fstatat \- get file status relative to a directory file descriptor
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <sys/stat.h>
 .sp
 .BI "int fstatat(int " dirfd ", const char *" pathname ", struct stat *" \
diff --git a/man2/futimesat.2 b/man2/futimesat.2
index 9b6034557..c4adf905b 100644
--- a/man2/futimesat.2
+++ b/man2/futimesat.2
@@ -29,6 +29,7 @@ futimes \- change timestamps of a file relative to a \
 directory file descriptor
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <fcntl.h>
 .sp
 .BI "int futimesat(int " dirfd ", const char *" pathname , 
diff --git a/man2/linkat.2 b/man2/linkat.2
index 5483dca9c..ce3db2f98 100644
--- a/man2/linkat.2
+++ b/man2/linkat.2
@@ -28,6 +28,7 @@
 linkat \- create a file link relative to directory file descriptors
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <unistd.h>
 .sp
 .BI "int linkat(int " olddirfd ", const char *" oldpath , 
diff --git a/man2/mkdirat.2 b/man2/mkdirat.2
index f8d5d6953..7fa0364f4 100644
--- a/man2/mkdirat.2
+++ b/man2/mkdirat.2
@@ -28,6 +28,7 @@
 mkdirat \- create a directory relative to a directory file descriptor
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <sys/stat.h>
 .sp
 .BI "int mkdirat(int " dirfd ", const char *" pathname ", mode_t " mode );
diff --git a/man2/mknodat.2 b/man2/mknodat.2
index 6118972d1..252053c06 100644
--- a/man2/mknodat.2
+++ b/man2/mknodat.2
@@ -29,6 +29,7 @@ mknodat \- create a special or ordinary file relative to a directory
 file descriptor
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <sys/stat.h>
 .sp
 .BI "int mknodat(int " dirfd ", const char *" pathname ", mode_t " mode \
diff --git a/man2/openat.2 b/man2/openat.2
index f5c860d7c..06ed200b7 100644
--- a/man2/openat.2
+++ b/man2/openat.2
@@ -28,6 +28,7 @@
 openat \- open a file relative to a directory file descriptor
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <fcntl.h>
 .sp
 .BI "int openat(int " dirfd ", const char *" pathname ", int " flags );
diff --git a/man2/readlinkat.2 b/man2/readlinkat.2
index 274508136..e055bf48c 100644
--- a/man2/readlinkat.2
+++ b/man2/readlinkat.2
@@ -29,6 +29,7 @@ readlinkat \- read value of a symbolic link relative to
 a directory file descriptor
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <unistd.h>
 .sp
 .BI "int readlinkat(int " dirfd ", const char *" pathname \
diff --git a/man2/renameat.2 b/man2/renameat.2
index cd4c57dcc..2ff2e42d5 100644
--- a/man2/renameat.2
+++ b/man2/renameat.2
@@ -28,6 +28,7 @@
 renameat \- rename a file relative to directory file descriptors
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <stdio.h>
 .sp
 .BI "int renameat(int " olddirfd ", const char *" oldpath , 
diff --git a/man2/symlinkat.2 b/man2/symlinkat.2
index 24f23994f..85379242a 100644
--- a/man2/symlinkat.2
+++ b/man2/symlinkat.2
@@ -28,6 +28,7 @@
 symlinkat \- create a symbolic link relative to a directory file descriptor
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <stdio.h>
 .sp
 .BI "int symlinkat(const char *" oldpath ", int " newdirfd \
diff --git a/man2/unlinkat.2 b/man2/unlinkat.2
index cdf82ef4b..ce44f1841 100644
--- a/man2/unlinkat.2
+++ b/man2/unlinkat.2
@@ -28,6 +28,7 @@
 unlinkat \- remove a directory entry relative to a directory file descriptor
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <fcntl.h>
 .sp
 .BI "int unlinkat(int " dirfd ", const char *" pathname ", int " flags );
diff --git a/man3/mkfifoat.3 b/man3/mkfifoat.3
index 0dd994563..5a8635b7d 100644
--- a/man3/mkfifoat.3
+++ b/man3/mkfifoat.3
@@ -28,6 +28,7 @@
 mkfifoat \- make a FIFO (named pipe) relative to a directory file descriptor
 .SH SYNOPSIS
 .nf
+.B #define _ATFILE_SOURCE
 .B #include <sys/stat.h>
 .sp
 .BI "int mkfifoat(int " dirfd ", const char *" pathname ", mode_t " mode );