diff --git a/src/demo/yield.c b/src/demo/yield.c
index 828e47c30..aa74cf4b1 100644
--- a/src/demo/yield.c
+++ b/src/demo/yield.c
@@ -74,6 +74,9 @@ int yield_demo(struct notcurses* nc){
     ncplane_set_bg_rgb(std, 0x10, 0x10, 0x10);
     ncplane_set_fg_rgb(std, 0xf0, 0x20, 0x20);
     ncplane_set_attr(std, NCSTYLE_BOLD);
+    if(tfilled > threshold_painted){
+      tfilled = threshold_painted; // don't allow printing of 100.1% etc
+    }
     ncplane_printf_aligned(std, 3, NCALIGN_CENTER, "Yield: %3.1f%%", ((double)tfilled * 100) / threshold_painted);
     ncplane_set_attr(std, NCSTYLE_NONE);
     DEMO_RENDER(nc);