1 files changed, 1 insertions, 1 deletions
diff --git a/chickadee.scm b/chickadee.scm
index 3c0e1c9..f847915 100644
--- a/chickadee.scm
+++ b/chickadee.scm
@@ -88,7 +88,7 @@
     (define (invert-y y)
       ;; SDL's origin is the top-left, but our origin is the bottom
       ;; left so we need to invert Y coordinates that SDL gives us.
-      (- (window-height window) y))
+      (- window-height y))
     (define (process-event event)
       (cond
        ((quit-event? event)