diff --git a/packages/node_modules/pouchdb-abstract-mapreduce/src/index.js b/packages/node_modules/pouchdb-abstract-mapreduce/src/index.js
index 630c15e..070560c 100644
--- a/packages/node_modules/pouchdb-abstract-mapreduce/src/index.js
+++ b/packages/node_modules/pouchdb-abstract-mapreduce/src/index.js
@@ -285,7 +285,19 @@
         method: method,
         url: '_design/' + parts[0] + '/_view/' + parts[1] + params,
         body: body
-      }).then(postprocessAttachments(opts));
+      }).then(
+        /* istanbul ignore next */
+        function (result) {
+          // fail the entire request if the result contains an error
+          result.rows.forEach(function (row) {
+            if (row.value && row.value.error && row.value.error === "builtin_reduce_error") {
+              throw new Error(row.reason);
+            }
+          });
+
+          return result;
+      })
+      .then(postprocessAttachments(opts));
     }
 
     // We are using a temporary view, terrible for performance, good for testing