diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9126e82a2..26e312d65 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -405,6 +405,7 @@ check_function_exists( strcasecmp HAVE_STRCASECMP )
 check_function_exists( strchr HAVE_STRCHR )
 check_function_exists( strcmp HAVE_STRCMP )
 check_function_exists( strrchr HAVE_STRRCHR )
+check_function_exists( posix_openpt HAVE_POSIX_OPENPT )
 check_function_exists( ptsname HAVE_PTSNAME )
 check_function_exists( unlockpt HAVE_UNLOCKPT )
 check_function_exists( _getpty HAVE__GETPTY )
diff --git a/config.h.cmake b/config.h.cmake
index 0bced5c2b..d84c4b087 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -431,6 +431,9 @@
 /* Define to 1 if you have the `poll' function. */
 #cmakedefine HAVE_POLL 1
 
+/* Define to 1 if you have the `posix_openpt' function. */
+#cmakedefine HAVE_POSIX_OPENPT 1
+
 /* Define to 1 if the assembler supports AltiVec instructions. */
 #undef HAVE_PPC_ALTIVEC
 
diff --git a/kdecore/kpty.cpp b/kdecore/kpty.cpp
index 45e9c6ffd..7c58f74a9 100644
--- a/kdecore/kpty.cpp
+++ b/kdecore/kpty.cpp
@@ -329,7 +329,11 @@ bool KPty::open()
   // We try, as we know them, one by one.
 
 #if defined(HAVE_PTSNAME) && defined(HAVE_GRANTPT)
-#ifdef _AIX
+#if defined(HAVE_GETPT)
+  d->masterFd = ::getpt();
+#elif defined(HAVE_POSIX_OPENPT)
+  d->masterFd = ::posix_openpt(O_RDWR);
+#elif defined(_AIX)
   d->masterFd = ::open("/dev/ptc",O_RDWR);
 #else
   d->masterFd = ::open("/dev/ptmx",O_RDWR);
diff --git a/kdesu/kdesu_pty.cpp b/kdesu/kdesu_pty.cpp
index 8f48f0b88..506118e08 100644
--- a/kdesu/kdesu_pty.cpp
+++ b/kdesu/kdesu_pty.cpp
@@ -94,10 +94,14 @@ PTY::~PTY()
 int PTY::getpt()
 {
 
-#if defined(HAVE_GETPT) && defined(HAVE_PTSNAME)
+#if (defined(HAVE_GETPT) || defined(HAVE_POSIX_OPENPT)) && defined(HAVE_PTSNAME)
 
     // 1: UNIX98: preferred way
+#ifdef HAVE_GETPT
     ptyfd = ::getpt();
+#elif defined(HAVE_POSIX_OPENPT)
+    ptyfd = ::posix_openpt(O_RDWR);
+#endif
     ttyname = ::ptsname(ptyfd);
     return ptyfd;
 
diff --git a/krsync/krsync.cpp b/krsync/krsync.cpp
index b9f6f1305..8ba1a54bc 100644
--- a/krsync/krsync.cpp
+++ b/krsync/krsync.cpp
@@ -97,6 +97,8 @@ Reference Manual for Version 2.2.x of the GNU C Library */
 
 #ifdef HAVE_GETPT
     master = getpt();
+#elif defined(HAVE_POSIX_OPENTPT)
+    master = posix_openpt(O_RDWR);
 #else
     master = open("/dev/ptmx", O_RDWR);
 #endif