diff --git a/src/helpers.rs b/src/helpers.rs
index eae4568..dfd2c29 100644
--- a/src/helpers.rs
+++ b/src/helpers.rs
@@ -33,6 +33,6 @@ pub fn set_up_helpers(db: &mut dyn Conn, current_migration: &Option<String>) ->
 }
 
 pub fn tear_down_helpers(db: &mut dyn Conn) -> anyhow::Result<()> {
-    db.query("DROP FUNCTION reshape.is_old_schema;")?;
+    db.query("DROP FUNCTION IF EXISTS reshape.is_old_schema;")?;
     Ok(())
 }