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diff --git a/lib/libcurses/curs_clear.3 b/lib/libcurses/curs_clear.3
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+++ b/lib/libcurses/curs_clear.3
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+.TH curs_clear 3X ""
+.SH NAME
+\fBerase\fR, \fBwerase\fR, \fBclear\fR,
+\fBwclear\fR, \fBclrtobot\fR, \fBwclrtobot\fR, \fBclrtoeol\fR,
+\fBwclrtoeol\fR - clear all or part of a \fBcurses\fR window
+.SH SYNOPSIS
+\fB# include <curses.h>\fR
+
+\fBint erase(void);\fR
+.br
+\fBint werase(WINDOW *win);\fR
+.br
+\fBint clear(void);\fR
+.br
+\fBint wclear(WINDOW *win);\fR
+.br
+\fBint clrtobot(void);\fR
+.br
+\fBint wclrtobot(WINDOW *win);\fR
+.br
+\fBint clrtoeol(void);\fR
+.br
+\fBint wclrtoeol(WINDOW *win);\fR
+.br
+.SH DESCRIPTION
+The \fBerase\fR and \fBwerase\fR routines copy blanks to every
+position in the window, clearing the screen.
+
+The \fBclear\fR and \fBwclear\fR routines are like \fBerase\fR and
+\fBwerase\fR, but they also call \fBclearok\fR, so that the screen is
+cleared completely on the next call to \fBwrefresh\fR for that window
+and repainted from scratch.
+
+The \fBclrtobot\fR and \fBwclrtobot\fR routines erase from the cursor to the
+end of screen.  That is, they erase all lines below the cursor in the window.
+Also, the current line to the right of the cursor, inclusive, is erased.
+
+The \fBclrtoeol\fR and \fBwclrtoeol\fR routines erase the current line
+to the right of the cursor, inclusive, to the end of the current line.
+
+Blanks created by erasure have the current background rendition (as set
+by \fBwbkgdset\fR) merged into them.
+.SH RETURN VALUE
+All routines return the integer \fBOK\fR.  The SVr4.0 manual says "or a
+non-negative integer if \fBimmedok\fR is set", but this appears to be an error.
+.SH NOTES
+Note that \fBerase\fR, \fBwerase\fR, \fBclear\fR, \fBwclear\fR,
+\fBclrtobot\fR, and \fBclrtoeol\fR may be macros.
+.SH PORTABILITY
+These functions are described in the XSI Curses standard, Issue 4.  The
+standard specifies that they return \fBERR\fR on failure, but specifies no
+error conditions.
+
+Some historic curses implementations had, as an undocumented feature, the
+ability to do the equivalent of \fBclearok(..., 1)\fR by saying
+\fBtouchwin(stdscr)\fR or \fBclear(stdscr)\fR.  This will not work under
+ncurses.
+.SH SEE ALSO
+\fBcurses\fR(3X), \fBcurs_outopts\fR(3X), \fBcurs_refresh\fR(3X)
+.\"#
+.\"# The following sets edit modes for GNU EMACS
+.\"# Local Variables:
+.\"# mode:nroff
+.\"# fill-column:79
+.\"# End: