diff --git a/sahi/utils/coco.py b/sahi/utils/coco.py
index 5db4e9ad0..4938cbaf7 100644
--- a/sahi/utils/coco.py
+++ b/sahi/utils/coco.py
@@ -1264,7 +1264,7 @@ def get_area_filtered_coco(self, min=0, max=float('inf'), intervals_per_category
         for image in self.images:
             is_valid_image = True
             for annotation in image.annotations:
-                if intervals_per_category is not None:
+                if intervals_per_category is not None and annotation.name in intervals_per_category.keys():
                     category_based_min = intervals_per_category[annotation.category_name]["min"]
                     category_based_max = intervals_per_category[annotation.category_name]["max"]
                     if (annotation.area < category_based_min