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-rw-r--r--man3/strerror.35
1 files changed, 4 insertions, 1 deletions
diff --git a/man3/strerror.3 b/man3/strerror.3
index a7a7ed5710..a20998a95b 100644
--- a/man3/strerror.3
+++ b/man3/strerror.3
@@ -39,7 +39,10 @@ strerror, strerror_r \- return string describing error code
.B #include <string.h>
.sp
.BI "char *strerror(int " errnum );
-.br
+.sp
+.B #define _XOPEN_SOURCE 600
+.B #include <string.h>
+.sp
.BI "int strerror_r(int " errnum ", char *" buf ", size_t " n );
.fi
.SH DESCRIPTION