diff --git a/src/sql/hydra.sql b/src/sql/hydra.sql
index 3d22d942..3d225cf1 100644
--- a/src/sql/hydra.sql
+++ b/src/sql/hydra.sql
@@ -623,4 +623,4 @@ create index IndexReleaseMembersOnBuild on ReleaseMembers(build);
 create index IndexBuildsOnKeep on Builds(keep) where keep = 1;
 
 -- To get the most recent eval for a jobset.
-create index IndexJobsetEvalsOnJobsetId on JobsetEvals(project, jobset, hasNewBuilds, id desc);
+create index IndexJobsetEvalsOnJobsetId on JobsetEvals(project, jobset, id desc) where hasNewBuilds = 1;
diff --git a/src/sql/upgrade-38.sql b/src/sql/upgrade-38.sql
new file mode 100644
index 00000000..0f4b207e
--- /dev/null
+++ b/src/sql/upgrade-38.sql
@@ -0,0 +1,2 @@
+drop index IndexJobsetEvalsOnJobsetId;
+create index IndexJobsetEvalsOnJobsetId on JobsetEvals(project, jobset, id desc) where hasNewBuilds = 1;