diff --git a/man2/copy_file_range.2 b/man2/copy_file_range.2
index 345105c9b..a237922ea 100644
--- a/man2/copy_file_range.2
+++ b/man2/copy_file_range.2
@@ -98,8 +98,10 @@ One or more file descriptors are not valid; or
 is not open for reading; or
 .I fd_out
 is not open for writing; or
-.I fd_out
-is open for appending.
+the
+.B O_APPEND
+flag is set for the open file description referred to by
+.IR fd_out .
 .TP
 .B EINVAL
 Requested range extends beyond the end of the source file; or the