diff --git a/src/base/single/input/file.js b/src/base/single/input/file.js
index 290970141..1769de9c5 100644
--- a/src/base/single/input/file.js
+++ b/src/base/single/input/file.js
@@ -437,11 +437,11 @@
             var matches;
             matches = mime.match(r1);
             if (matches) {
-                return fileName.toLowerCase().indexOf(matches[1]) > -1;
+                return fileName.toLowerCase().endsWith(matches[0]);
             }
             matches = mime.match(r2);
             if (matches) {
-                return matches[1] === "*" ? true : fileName.toLowerCase().indexOf(matches[1]) > -1;
+                return matches[1] === "*" ? true : fileName.toLowerCase().endsWith(`.${matches[1]}`);
             }
         });
     }