diff --git a/src/universal/bin/sbt-launch-lib.bash b/src/universal/bin/sbt-launch-lib.bash
index 760bade4e..0c1b4d509 100755
--- a/src/universal/bin/sbt-launch-lib.bash
+++ b/src/universal/bin/sbt-launch-lib.bash
@@ -191,7 +191,7 @@ run() {
   exit_code=$?
 
   # Clean up the terminal from cygwin hacks.
-  if [[ "$IS_CYGWIN" == "true" ]]; then
+  if [[ "$CYGWIN_FLAG" == "true" ]]; then
     stty icanon echo > /dev/null 2>&1
   fi
   exit $exit_code