diff --git a/CHANGELOG.md b/CHANGELOG.md
index afc0bd77..86006ced 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 - `[initsystem/sdnotify]` Added new package for sending messages to systemd
 - `[support/deps]` Updated for compatibility with the latest version of [depsy](https://kaos.sh/depsy)
+- `[terminal/tty]` Improved check for systemd
 
 ### 12.120.0
 
diff --git a/terminal/tty/tty_posix.go b/terminal/tty/tty_posix.go
index f3adb6c7..f25174b8 100644
--- a/terminal/tty/tty_posix.go
+++ b/terminal/tty/tty_posix.go
@@ -46,8 +46,7 @@ func IsFakeTTY() bool {
 
 // IsSystemd returns true if process started by systemd
 func IsSystemd() bool {
-	return os.Getenv("INVOCATION_ID") != "" ||
-		os.Getenv("SYSTEMCTL_IGNORE_DEPENDENCIES") != ""
+	return os.Getppid() == 1
 }
 
 // ////////////////////////////////////////////////////////////////////////////////// //
diff --git a/terminal/tty/tty_test.go b/terminal/tty/tty_test.go
index 28e22c94..27e3c975 100644
--- a/terminal/tty/tty_test.go
+++ b/terminal/tty/tty_test.go
@@ -48,12 +48,7 @@ func (s *TTYSuite) TestIsTTY(c *C) {
 }
 
 func (s *TTYSuite) TestIsSystemd(c *C) {
-	os.Setenv("INVOCATION_ID", "")
-	os.Setenv("SYSTEMCTL_IGNORE_DEPENDENCIES", "")
-	c.Assert(IsSystemd(), Equals, false)
-	os.Setenv("INVOCATION_ID", "5d0149bfa2c34b79bccb13074001eb20")
-	c.Assert(IsSystemd(), Equals, true)
-	os.Setenv("INVOCATION_ID", "")
+	IsSystemd()
 }
 
 func (s *TTYSuite) TestIsTMUX(c *C) {