diff --git a/Source/kwsys/Terminal.c b/Source/kwsys/Terminal.c
index c9515ee7d0..4d1b46c871 100644
--- a/Source/kwsys/Terminal.c
+++ b/Source/kwsys/Terminal.c
@@ -146,6 +146,7 @@ static const char* kwsysTerminalVT100Names[] = { "Eterm",
                                                  "screen-bce",
                                                  "screen-w",
                                                  "screen.linux",
+                                                 "st-256color",
                                                  "tmux",
                                                  "tmux-256color",
                                                  "vt100",