diff --git a/sanitizer/_geo_common.js b/sanitizer/_geo_common.js
index e8134cc1..2f2fbfd4 100644
--- a/sanitizer/_geo_common.js
+++ b/sanitizer/_geo_common.js
@@ -49,7 +49,7 @@ function sanitize_bbox_min_max(raw, key_prefix) {
     const min = parseFloat(raw[`${key_prefix}.min_${dimension}`]);
 
     if (max <= min) {
-      throw new Error(`min_${dimension} is larger than max_${dimension} in ${key_prefix}`);
+      throw new Error(`${key_prefix}.min_${dimension} (${min}) must be less than ${key_prefix}.max_${dimension} (${max})`);
     }
   });
 }