diff --git a/server/store/adapters/rdbms/drivers/dialect.go b/server/store/adapters/rdbms/drivers/dialect.go
index bf580ce2f..4d35708b3 100644
--- a/server/store/adapters/rdbms/drivers/dialect.go
+++ b/server/store/adapters/rdbms/drivers/dialect.go
@@ -200,5 +200,5 @@ func opHandlerIn(d Dialect, n *ql.ASTNode, negate bool, args ...exp.Expression)
 		return
 	}
 
-	return nil, fmt.Errorf("unsupported IN operator")
+	return nil, fmt.Errorf("unsupported IN operator on a single value field")
 }