diff --git a/service_aix.go b/service_aix.go
index 5710b96..58f356d 100644
--- a/service_aix.go
+++ b/service_aix.go
@@ -44,20 +44,17 @@ func (aixSystem) New(i Interface, c *Config) (Service, error) {
 	return s, nil
 }
 
-func getPidOfSvcMaster() int {
-	pat := regexp.MustCompile(`\s+root\s+(\d+)\s+\d+\s+\d+\s+\w+\s+\d+\s+\S+\s+[0-9:]+\s+/usr/sbin/srcmstr`)
-	cmd := exec.Command("ps", "-ef")
+func getArgsFromPid(pid int) string {
+	cmd := exec.Command("ps", "-o", "args", "-p", strconv.Itoa(pid))
 	var out bytes.Buffer
 	cmd.Stdout = &out
-	pid := 0
 	if err := cmd.Run(); err == nil {
-		matches := pat.FindAllStringSubmatch(out.String(), -1)
-		for _, match := range matches {
-			pid, _ = strconv.Atoi(match[1])
-			break
+		lines := strings.Split(out.String(), "\n")
+		if len(lines) > 1 {
+			return strings.TrimSpace(lines[1])
 		}
 	}
-	return pid
+	return ""
 }
 
 func init() {
@@ -75,8 +72,8 @@ func init() {
 }
 
 func isInteractive() (bool, error) {
-	// The PPid of a service process should match PID of srcmstr.
-	return os.Getppid() != getPidOfSvcMaster(), nil
+	// The parent process of a service process should be srcmstr.
+	return getArgsFromPid(os.Getppid()) != "/usr/sbin/srcmstr", nil
 }
 
 type aixService struct {