diff --git a/bindings/py3devil1geo.py b/bindings/py3devil1geo.py
index fabf65d..e1bdd9e 100644
--- a/bindings/py3devil1geo.py
+++ b/bindings/py3devil1geo.py
@@ -112,7 +112,7 @@ class Devil1GEO_FN(ctypes.Structure):
                                      None,
                                      ctypes.POINTER(Coordinate))),
         ("getheader",       ctypes.CFUNCTYPE(
-                                     None,
+                                     ctypes.c_bool,
                                      ctypes.POINTER(ctypes.POINTER(Header)),
                                      ctypes.c_char_p)),
         ("getmeshheader",   ctypes.CFUNCTYPE(