diff --git a/src/Illuminate/Validation/Concerns/ValidatesAttributes.php b/src/Illuminate/Validation/Concerns/ValidatesAttributes.php
index 9803208ae902..948110a7fbe8 100644
--- a/src/Illuminate/Validation/Concerns/ValidatesAttributes.php
+++ b/src/Illuminate/Validation/Concerns/ValidatesAttributes.php
@@ -563,7 +563,7 @@ protected function failsRatioCheck($parameters, $width, $height)
             [1, 1], array_filter(sscanf($parameters['ratio'], '%f/%d'))
         );
 
-        $precision = 1 / max($width, $height);
+        $precision = 1 / (max($width, $height) + 1);
 
         return abs($numerator / $denominator - $width / $height) > $precision;
     }