diff --git a/src/ol/format/filter/Bbox.js b/src/ol/format/filter/Bbox.js
index abcb11e1e7..d45a20982a 100644
--- a/src/ol/format/filter/Bbox.js
+++ b/src/ol/format/filter/Bbox.js
@@ -30,11 +30,11 @@ class Bbox extends Filter {
     /**
      * @type {import("../../extent.js").Extent}
      */
-      if(extent.length === 4) {
-          this.extent = extent;
-      } else {
-        throw new Error('Error: Extent should look like this: [minx, miny, maxx, maxy]');
-      }
+    if (extent.length === 4) {
+      this.extent = extent;
+    } else {
+      throw new Error('Error: Extent should look like this: [minx, miny, maxx, maxy]');
+    }
 
     /**
      * @type {string|undefined}