diff --git a/src/auto/configure b/src/auto/configure
index 13eaea6..d135948 100755
--- a/src/auto/configure
+++ b/src/auto/configure
@@ -12350,10 +12350,18 @@
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
+// These should be in stdlib.h, but it depends on _XOPEN_SOURCE.
+char *ptsname(int);
+int unlockpt(int);
+int grantpt(int);
+
 int
 main ()
 {
-ptsname(0);grantpt(0);unlockpt(0);
+
+		ptsname(0);
+		grantpt(0);
+		unlockpt(0);
   ;
   return 0;
 }
diff --git a/src/configure.ac b/src/configure.ac
index 457f2b8..010cc8f 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -3593,7 +3593,15 @@
 
 AC_MSG_CHECKING(for SVR4 ptys)
 if test -c /dev/ptmx ; then
-  AC_TRY_LINK([], [ptsname(0);grantpt(0);unlockpt(0);],
+  AC_TRY_LINK([
+// These should be in stdlib.h, but it depends on _XOPEN_SOURCE.
+char *ptsname(int);
+int unlockpt(int);
+int grantpt(int);
+	       ], [
+		ptsname(0);
+		grantpt(0);
+		unlockpt(0);],
 	AC_MSG_RESULT(yes); AC_DEFINE(HAVE_SVR4_PTYS),
 	AC_MSG_RESULT(no))
 else
diff --git a/src/version.c b/src/version.c
index 8c4c3fa..0308c91 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2056,
+/**/
     2055,
 /**/
     2054,