diff --git a/pyTDFSDK/classes.py b/pyTDFSDK/classes.py
index 34225f1..0b550bd 100644
--- a/pyTDFSDK/classes.py
+++ b/pyTDFSDK/classes.py
@@ -276,7 +276,7 @@ def get_maldi_tsf_data(self):
             self.low_mz = float(min(self.mz_array))
             # MS1
             if int(frames_dict['MsMsType']) == 0:
-                self.scan_type = 'MS1 specttrum'
+                self.scan_type = 'MS1 spectrum'
                 self.ms_level = 1
             # MS/MS
             elif int(frames_dict['MsMsType']) in [2, 8, 9]: