diff --git a/modules/bindings/pymod/dssp.py b/modules/bindings/pymod/dssp.py
index f27aa9db9405357a3221adffb190921092febad5..fe33b33f18987c7e3713016efe78406711d2cfea 100644
--- a/modules/bindings/pymod/dssp.py
+++ b/modules/bindings/pymod/dssp.py
@@ -111,7 +111,7 @@ def AssignDSSP(ent, pdb_path="", extract_burial_status=False, tmp_dir=None,
   # are handled in the parser LoadDSSP)
   temp_dssp_path=_ExecuteDSSP(pdb_path, dssp_bin)
   if not os.path.exists(temp_dssp_path):
-    raise RuntimeEror('DSSP output file does not exist.')
+    raise RuntimeError('DSSP output file does not exist.')
   # assign DSSP to entity
   try:
     LoadDSSP(temp_dssp_path, ent, extract_burial_status,