diff --git a/module_build_service/migrations/versions/40b2c7d988d7_add_reused_module_id_column.py b/module_build_service/migrations/versions/40b2c7d988d7_add_reused_module_id_column.py
index 4035178f..83c112b0 100644
--- a/module_build_service/migrations/versions/40b2c7d988d7_add_reused_module_id_column.py
+++ b/module_build_service/migrations/versions/40b2c7d988d7_add_reused_module_id_column.py
@@ -16,7 +16,6 @@ import sqlalchemy as sa
 
 def upgrade():
     op.add_column('module_builds', sa.Column('reused_module_id', sa.Integer(), nullable=True))
-    sa.ForeignKeyConstraint(['reused_module_id'], ['module_builds.id'], ),
 
 
 def downgrade():
diff --git a/module_build_service/migrations/versions/d5188b4a7bf1_add_fk_reused_module_id.py b/module_build_service/migrations/versions/d5188b4a7bf1_add_fk_reused_module_id.py
new file mode 100644
index 00000000..136d78d9
--- /dev/null
+++ b/module_build_service/migrations/versions/d5188b4a7bf1_add_fk_reused_module_id.py
@@ -0,0 +1,23 @@
+"""Add the missing foreign key constraint for reused_module_id
+
+Revision ID: d5188b4a7bf1
+Revises: 0b00036c540f
+Create Date: 2019-08-02 13:22:14.257869
+"""
+
+# revision identifiers, used by Alembic.
+revision = "d5188b4a7bf1"
+down_revision = "0b00036c540f"
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    with op.batch_alter_table("module_builds", schema=None) as batch_op:
+        batch_op.create_foreign_key("reused_module", "module_builds", ["reused_module_id"], ["id"])
+
+
+def downgrade():
+    with op.batch_alter_table("module_builds", schema=None) as batch_op:
+        batch_op.drop_constraint("reused_module", type_="foreignkey")