diff --git a/man-pages/man2/copy_file_range.2 b/man-pages/man2/copy_file_range.2
index 35c0967..f25ea95 100644
--- a/man-pages/man2/copy_file_range.2
+++ b/man-pages/man2/copy_file_range.2
@@ -78,7 +78,7 @@ is adjusted appropriately.
 The
 .I flags
 argument is provided to allow for future extensions
-and currently must be to 0.
+and currently must be set to 0.
 .SH RETURN VALUE
 Upon successful completion,
 .BR copy_file_range ()
@@ -109,7 +109,11 @@ maximum file size or the process's file size limit,
 or to write at a position past the maximum allowed offset.
 .TP
 .B EINVAL
-Requested range extends beyond the end of the source file; or the
+Requested range extends beyond the end of the source file; or either
+.I fd_in
+or
+.I fd_out
+is not a regular file; or the
 .I flags
 argument is not 0.
 .TP
@@ -117,6 +121,7 @@ argument is not 0.
 A low-level I/O error occurred while copying.
 .TP
 .B EISDIR
+Either
 .I fd_in
 or
 .I fd_out