diff --git a/graphein/protein/features/nodes/dssp.py b/graphein/protein/features/nodes/dssp.py
index d4cf60fe..863e4e53 100644
--- a/graphein/protein/features/nodes/dssp.py
+++ b/graphein/protein/features/nodes/dssp.py
@@ -118,10 +118,10 @@ def add_dssp_df(G: nx.Graph, dssp_config: Optional[DSSPConfig]) -> nx.Graph:
     ), "DSSP must be on PATH and marked as an executable"
 
     # Check for existence of pdb file. If not, download it.
-    if not os.path.isfile(config.pdb_dir / pdb_id):
+    if not os.path.isfile(config.pdb_dir / (pdb_id + ".pdb")):
         pdb_file = download_pdb(config, pdb_id)
     else:
-        pdb_file = config.pdb_dir + pdb_id + ".pdb"
+        pdb_file = config.pdb_dir / (pdb_id + ".pdb")
 
     if config.verbose:
         print(f"Using DSSP executable '{executable}'")
diff --git a/graphein/protein/graphs.py b/graphein/protein/graphs.py
index fb5e9a10..2ac73c25 100644
--- a/graphein/protein/graphs.py
+++ b/graphein/protein/graphs.py
@@ -582,7 +582,7 @@ def construct_graph(
         granularity=config.granularity,
     )
     protein_df = process_dataframe(
-        raw_df, chain_selection=chain_selection, granularity=config.granularity
+        raw_df, chain_selection=chain_selection, granularity=config.granularity, insertions=config.insertions
     )
 
     # Initialise graph with metadata