diff --git a/pyzebra/load_1D.py b/pyzebra/load_1D.py
index 44dbcd5..3ef6220 100644
--- a/pyzebra/load_1D.py
+++ b/pyzebra/load_1D.py
@@ -200,7 +200,7 @@ def parse_1D(fileobj, data_type):
         data_cols['omega_angle'] = metadata['omega']
         data_cols['number_of_measurements'] = len(data_cols['om'])
         data_cols['monitor'] = data_cols['Monitor1'][0]
-        measurements["1"] = dict(data_cols)
+        measurements[1] = dict(data_cols)
 
     else:
         print("Unknown file extention")