diff --git a/changelog.md b/changelog.md
index ba3c62d2060..a55f6ff71db 100644
--- a/changelog.md
+++ b/changelog.md
@@ -4,6 +4,7 @@ when upgrading from a version of rust-sdl2 to another.
 ### Unreleased
 
  * Add patch to fix metal detection (https://bugzilla.libsdl.org/show_bug.cgi?id=4988)
+ * Changed signature of TimerSubsystem::ticks to accept `&self`.
 
 ### v0.34.3
 
diff --git a/src/sdl2/timer.rs b/src/sdl2/timer.rs
index f6a226cf358..f321c5186f0 100644
--- a/src/sdl2/timer.rs
+++ b/src/sdl2/timer.rs
@@ -31,7 +31,7 @@ impl TimerSubsystem {
     /// Gets the number of milliseconds elapsed since the timer subsystem was initialized.
     ///
     /// It's recommended that you use another library for timekeeping, such as `time`.
-    pub fn ticks(&mut self) -> u32 {
+    pub fn ticks(&self) -> u32 {
         // Google says this is probably not thread-safe (TODO: prove/disprove this).
         unsafe { sys::SDL_GetTicks() }
     }