diff --git a/migrations/0005_JMDict_search_index_tables.sql b/migrations/0005_JMDict_search_index_tables.sql
index c88db1e..26f40f7 100644
--- a/migrations/0005_JMDict_search_index_tables.sql
+++ b/migrations/0005_JMDict_search_index_tables.sql
@@ -15,8 +15,7 @@ CREATE TABLE "JMdict_EntryScore" (
 CREATE INDEX "JMdict_EntryScore_byElementId_byScore" ON "JMdict_EntryScore"("elementId", "score");
 CREATE INDEX "JMdict_EntryScore_byScore" ON "JMdict_EntryScore"("score");
 
-CREATE INDEX "JMdict_EntryScore_byElementId_byCommon" ON "JMdict_EntryScore"("elementId", "common");
-CREATE INDEX "JMdict_EntryScore_byCommon" ON "JMdict_EntryScore"("common");
+CREATE INDEX "JMdict_EntryScore_byCommon" ON "JMdict_EntryScore"("common") WHERE "common" = TRUE;
 
 -- NOTE: these views are deduplicated in order not to perform an unnecessary
 --       UNION on every trigger