diff --git a/exec.go b/exec.go
index 2e0e0b1..ddd556d 100644
--- a/exec.go
+++ b/exec.go
@@ -359,6 +359,18 @@ func execHandle(bg bool) interp.ExecHandlerFunc {
 
 		var j *job
 		if bg {
+			var procAttr *syscall.SysProcAttr
+			if runtime.GOOS != "windows" {
+				procAttr = &syscall.SysProcAttr{
+					CreationFlags: syscall.CREATE_NEW_PROCESS_GROUP,
+				}
+			} else {
+				procAttr = &syscall.SysProcAttr{
+					Setpgid: true,
+				}
+			}
+			cmd.SysProcAttr = procAttr
+
 			j = jobs.getLatest()
 			j.setHandle(&cmd)
 			err = j.start()