diff --git a/segpy/reader.py b/segpy/reader.py
index 977a53f..38e3585 100644
--- a/segpy/reader.py
+++ b/segpy/reader.py
@@ -103,7 +103,7 @@ def create_reader(fh, encoding=None, endian='>', progress=None):
         return SegYReader3D(fh, textual_reel_header, binary_reel_header, extended_textual_header, trace_offset_catalog,
                             trace_length_catalog, line_catalog)
 
-    return SegYReader(fh, textual_reel_header, binary_reel_header, extended_textual_header, trace_offset_catalog,
+    return SegYReader(fh, textual_reel_header, binary_reel_header, extended_textual_header, trace_offset_catalog, trace_length_catalog,
                       endian)
 
 
diff --git a/segpy/toolkit.py b/segpy/toolkit.py
index 3f79330..f841087 100644
--- a/segpy/toolkit.py
+++ b/segpy/toolkit.py
@@ -741,7 +741,7 @@ def write_trace_header(fh, trace_header, trace_header_format, pos=None):
     """
     if pos is not None:
         fh.seek(pos, os.SEEK_SET)
-    buf = trace_header_format.pack(trace_header)
+    buf = trace_header_format.pack(*trace_header)
     fh.write(buf)
 
 
@@ -877,4 +877,4 @@ if __name__ == '__main__':
                                             sweep_length_ms=10000,
                                             sweep_channel_number=3,
                                             sweep_type='spread')
-    pp(header, width=200)
\ No newline at end of file
+    pp(header, width=200)