diff --git a/IccImport/IccImporter.cs b/IccImport/IccImporter.cs
index e3f84c1..987ec5b 100644
--- a/IccImport/IccImporter.cs
+++ b/IccImport/IccImporter.cs
@@ -167,7 +167,7 @@ public Task<IResponse> ImportSubjectsAsync(List<SubjectData> subjects)
 
         public Task<IResponse> ImportSubstitutionsAsync(List<SubstitutionData> substitutions, bool suppressNotifications)
         {
-            return ImportAsync(new SubstitutionsData { Substitutions = substitutions, SuppressNotifications }, SubstitutionsUrl);
+            return ImportAsync(new SubstitutionsData { Substitutions = substitutions, SuppressNotifications = suppressNotifications }, SubstitutionsUrl);
         }
 
         public Task<IResponse> ImportSupervisionsAsync(string period, List<TimetableSupervisionData> supervisions)