diff --git a/alembic/versions/1f3de3853a1a_add_the_tree_id_column_to_pr_inline_.py b/alembic/versions/1f3de3853a1a_add_the_tree_id_column_to_pr_inline_.py
new file mode 100644
index 0000000..eb41dcd
--- /dev/null
+++ b/alembic/versions/1f3de3853a1a_add_the_tree_id_column_to_pr_inline_.py
@@ -0,0 +1,29 @@
+"""Add the tree_id column to PR inline comments
+
+Revision ID: 1f3de3853a1a
+Revises: 58e60d869326
+Create Date: 2016-02-22 16:13:59.943083
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '1f3de3853a1a'
+down_revision = '58e60d869326'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    ''' Add the column tree_id to the table pull_request_comments.
+    '''
+    op.add_column(
+        'pull_request_comments',
+        sa.Column('tree_id', sa.String(40), nullable=True)
+    )
+
+
+def downgrade():
+    ''' Remove the column tree_id from the table pull_request_comments.
+    '''
+    op.drop_column('pull_request_comments', 'tree_id')