diff --git a/common/yacreader_global.h b/common/yacreader_global.h
index d26afed6..5dcc2061 100644
--- a/common/yacreader_global.h
+++ b/common/yacreader_global.h
@@ -14,6 +14,12 @@
 
 #define IMPORT_COMIC_INFO_XML_METADATA "IMPORT_COMIC_INFO_XML_METADATA"
 #define COMPARE_MODIFIED_DATE_ON_LIBRARY_UPDATES "COMPARE_MODIFIED_DATE_ON_LIBRARY_UPDATES"
+#define UPDATE_LIBRARIES_AT_STARTUP "UPDATE_LIBRARIES_AT_STARTUP"
+#define DETECT_CHANGES_IN_LIBRARIES_AUTOMATICALLY "DETECT_CHANGES_IN_LIBRARIES_AUTOMATICALLY"
+#define UPDATE_LIBRARIES_PERIODICALLY "UPDATE_LIBRARIES_PERIODICALLY"
+#define UPDATE_LIBRARIES_PERIODICALLY_INTERVAL "UPDATE_LIBRARIES_PERIODICALLY_INTERVAL"
+#define UPDATE_LIBRARIES_AT_CERTAIN_TIME "UPDATE_LIBRARIES_AT_CERTAIN_TIME"
+#define UPDATE_LIBRARIES_AT_CERTAIN_TIME_TIME "UPDATE_LIBRARIES_AT_CERTAIN_TIME_TIME"
 
 #define NUM_DAYS_BETWEEN_VERSION_CHECKS "NUM_DAYS_BETWEEN_VERSION_CHECKS"
 #define LAST_VERSION_CHECK "LAST_VERSION_CHECK"