1 files changed, 3 insertions, 2 deletions

diff --git a/src/s/gnu-linux.h b/src/s/gnu-linux.h
index f5419a6e3af..86fc78b8b0f 100644
--- a/src/s/gnu-linux.h
+++ b/src/s/gnu-linux.h
@@ -77,14 +77,15 @@ Boston, MA 02111-1307, USA.  */
 #define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
 
 #undef PTY_TTY_NAME_SPRINTF
+/* This used to use SIGCLD, but that doesn't appear in glibc 2.1.  */
 #define PTY_TTY_NAME_SPRINTF                    \
   {                                             \
     char *ptsname (), *ptyname;                 \
                                                 \
-    sigblock (sigmask (SIGCLD));                \
+    sigblock (sigmask (SIGCHLD));               \
     if (grantpt (fd) == -1)                     \
       { close (fd); return -1; }                \
-    sigunblock (sigmask (SIGCLD));              \
+    sigunblock (sigmask (SIGCHLD));             \
     if (unlockpt (fd) == -1)                    \
       { close (fd); return -1; }                \
     if (!(ptyname = ptsname (fd)))              \