diff --git a/rickshaw-index b/rickshaw-index
index 5c93b3c..836370b 100755
--- a/rickshaw-index
+++ b/rickshaw-index
@@ -613,7 +613,7 @@ sub index_metrics {
             $metr_data_doc{'metric_desc'} = \%desc;
             $metr_data_doc{'metric_data'} = \%data;
             # cdmv8 includes a very small verison of the run doc info, just the run-uuid, to make deleting metric_data docs much easier
-            if ($cdm{'ver'} = 'v8dev') {
+            if ($cdm{'ver'} eq 'v8dev') {
                 my %micro_run_doc = ($run_id_field => $result{$run_id_field});
                 $metr_data_doc{'run'} = \%micro_run_doc;
             }