diff --git a/ereuse_devicehub/migrations/versions/378b6b147b46_nullable.py b/ereuse_devicehub/migrations/versions/378b6b147b46_nullable.py
index 5e7472dc..1a8e06c9 100644
--- a/ereuse_devicehub/migrations/versions/378b6b147b46_nullable.py
+++ b/ereuse_devicehub/migrations/versions/378b6b147b46_nullable.py
@@ -27,7 +27,7 @@ def get_inv():
     return INV
 
 def upgrade():
-    op.alter_column('{get_inv()}.computer', 'chassis', nullable=True)
+    op.alter_column('computer', 'chassis', nullable=True, schema=f'{get_inv()}')
     # pass