diff --git a/lib/Makefile b/lib/Makefile
index 916730260..33fc0fa5c 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -164,7 +164,7 @@ _OBJ_CXX := ProxySQL_GloVars.oo network.oo debug.oo configfile.oo Query_Cache.oo
 	PgSQL_Protocol.oo PgSQL_Thread.oo PgSQL_Data_Stream.oo PgSQL_Session.oo PgSQL_Variables.oo PgSQL_HostGroups_Manager.oo PgSQL_Connection.oo PgSQL_Backend.oo PgSQL_Logger.oo PgSQL_Authentication.oo PgSQL_Error_Helper.oo \
 	MySQL_Query_Cache.oo PgSQL_Query_Cache.oo PgSQL_Monitor.oo \
 	MySQL_Set_Stmt_Parser.oo PgSQL_Set_Stmt_Parser.oo \
-	PgSQL_Variables_Validator.oo
+	PgSQL_Variables_Validator.oo PgSQL_ExplicitTxnStateMgr.oo
 
 OBJ_CXX := $(patsubst %,$(ODIR)/%,$(_OBJ_CXX))
 HEADERS := ../include/*.h ../include/*.hpp