diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 4a3db39..a0c6bbc 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -57,3 +57,5 @@ jobs:
         run: lua -e "local fenster = require('fenster');print(fenster.time())"
         # Currently does not work for Windows (can't import 'fenster')
         if: matrix.os != 'windows-latest'
+
+# TODO: Run something like luacheck on the demos
diff --git a/src/main.c b/src/main.c
index a317ec1..e16ea75 100644
--- a/src/main.c
+++ b/src/main.c
@@ -234,7 +234,7 @@ static int lua_fenster_loop(lua_State *L) {
     // sleep for the remaining frame time to reach target frame time
     fenster_sleep(p_lf->target_frame_time - last_frame_time);
   }
-  now = fenster_time();
+  now = fenster_time(); // update now after sleep
   p_lf->delta = (double) (now - p_lf->start_frame_time) / 1000.0;
   p_lf->start_frame_time = now;