diff --git a/lib/svgo/coa.js b/lib/svgo/coa.js
index 4b434fe5c..62404fc34 100644
--- a/lib/svgo/coa.js
+++ b/lib/svgo/coa.js
@@ -15,13 +15,13 @@ const regSVGFile = /\.svg$/i;
 /**
  * Synchronously check if path is a directory. Tolerant to errors like ENOENT.
  *
- * @param {string} path
+ * @param {string} filePath
  */
-export function checkIsDir(path) {
+export function checkIsDir(filePath) {
   try {
-    return fs.lstatSync(path).isDirectory();
+    return fs.lstatSync(filePath).isDirectory();
   } catch (e) {
-    return false;
+    return filePath.endsWith(path.sep);
   }
 }