diff --git a/crates/emath/src/rect.rs b/crates/emath/src/rect.rs
index c1a7f603..94422707 100644
--- a/crates/emath/src/rect.rs
+++ b/crates/emath/src/rect.rs
@@ -628,7 +628,7 @@ impl Rect {
             tmax = tmax.min(ty1.max(ty2));
         }
 
-        tmin <= tmax
+        0.0 <= tmin && tmin <= tmax
     }
 }