--- a/incubator/ooSQLite/src/rexx/ooSQLite.cls
+++ b/incubator/ooSQLite/src/rexx/ooSQLite.cls
@@ -216,6 +216,8 @@
  *
  */
 ::class 'ooSQLiteMutex' public inherit ooSQLiteConstants
+
+::method init class external "LIBRARY oosqlite oosqlmtx_init_cls"
 
 ::attribute closed get unguarded external "LIBRARY oosqlite oosqlmtx_getClosed_atr"
 ::attribute isNull get unguarded external "LIBRARY oosqlite oosqlmtx_getIsNull_atr"