diff --git a/tools/gap-prep-runtime b/tools/gap-prep-runtime
index ff44f3f..43b6440 100755
--- a/tools/gap-prep-runtime
+++ b/tools/gap-prep-runtime
@@ -22,8 +22,9 @@ find . -type f \( -name '*.exe' -o -name '*.dll' -o -name '*.a' -o -name '*.o' -
 rm -f ../../run-gap.sh
 
 echo "#!/usr/bin/env bash" > ../../run-gap.sh
+echo "stty susp undef # disable ctrl-z" >> ../../run-gap.sh
 echo 'cd $(cygpath --mydocs)' >> ../../run-gap.sh
 echo "${GAP_ROOT}/gap" >> ../../run-gap.sh
 
 rm -f ../../gapicon.ico
-cp cnf/cygwin/gapicon.ico ../../gapicon.ico
\ No newline at end of file
+cp cnf/cygwin/gapicon.ico ../../gapicon.ico