diff --git a/include/grgsm/misc_utils/extract_cmc.h b/include/grgsm/misc_utils/extract_cmc.h
index 7b31564..c768980 100755
--- a/include/grgsm/misc_utils/extract_cmc.h
+++ b/include/grgsm/misc_utils/extract_cmc.h
@@ -53,6 +53,7 @@
       virtual std::vector<int> get_framenumbers() = 0;
       virtual std::vector<int> get_a5_versions() = 0;
       virtual std::vector<int> get_start_ciphering() = 0;
+      virtual std::vector<int> get_assignment_commands() = 0;
     };
 
   } // namespace gsm