diff --git a/render.c b/render.c
index a61438a4..ff387a0b 100644
--- a/render.c
+++ b/render.c
@@ -100,7 +100,7 @@ presented(void *data,
     unsigned frame_count = 0;
     if (tll_length(term->window->on_outputs) > 0) {
         const struct monitor *mon = tll_front(term->window->on_outputs);
-        frame_count = (double)(diff.tv_sec * 1000000 + diff.tv_usec) / (1. / mon->refresh * 1000000.);
+        frame_count = (diff.tv_sec * 1000000. + diff.tv_usec) / (1000000. / mon->refresh);
     }
 
     presentation_statistics.total++;