diff --git a/Source/kwsys/SystemTools.cxx b/Source/kwsys/SystemTools.cxx
index 1643c1635..f860bb5c0 100644
--- a/Source/kwsys/SystemTools.cxx
+++ b/Source/kwsys/SystemTools.cxx
@@ -37,6 +37,7 @@
 #include <sys/wait.h>
 #include <sys/ioctl.h>
 #include <unistd.h>
+#include <termios.h>
 #endif
 
 #if defined(_WIN32) && (defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MINGW32__))