diff --git a/sql/data_schema.sql b/sql/data_schema.sql
index 9e3a526b7..644f6ca15 100644
--- a/sql/data_schema.sql
+++ b/sql/data_schema.sql
@@ -217,7 +217,7 @@ CREATE INDEX gene_other_names_name ON data.gene_other_names (name);
 CREATE INDEX gene_other_names_gene ON data.gene_other_names (gene);
 CREATE INDEX genes_gene_id ON data.genes (gene_id);
 CREATE INDEX transcripts_transcript_id ON data.transcripts (transcript_id);
-CREATE INDEX variants_chrom_pos ON data.variants (chrom, pos);
+CREATE INDEX variants_dv_pos_chrom ON data.variants (dataset_version, pos, chrom);
 CREATE INDEX variants_rsid ON data.variants (rsid);
 CREATE INDEX variant_genes_gene ON data.variant_genes (gene);
 CREATE INDEX variant_genes_variant ON data.variant_genes (variant);