diff --git a/include/common/hathreads.h b/include/common/hathreads.h
index f68dc7e..25c1737 100644
--- a/include/common/hathreads.h
+++ b/include/common/hathreads.h
@@ -170,6 +170,7 @@
 	SPOE_APPLET_LOCK,
 	DNS_LOCK,
 	PID_LIST_LOCK,
+	EMAIL_ALERTS_LOCK,
 	LOCK_LABELS
 };
 struct lock_stat {
@@ -258,7 +259,7 @@
 					   "UPDATED_SERVERS", "LBPRM", "SIGNALS", "STK_TABLE", "STK_SESS",
 					   "APPLETS", "PEER", "BUF_WQ", "STREAMS", "SSL", "SSL_GEN_CERTS",
 					   "PATREF", "PATEXP", "PATLRU", "VARS", "COMP_POOL", "LUA",
-					   "NOTIF", "SPOE_APPLET", "DNS", "PID_LIST" };
+					   "NOTIF", "SPOE_APPLET", "DNS", "PID_LIST", "EMAIL_ALERTS" };
 	int lbl;
 
 	for (lbl = 0; lbl < LOCK_LABELS; lbl++) {
diff --git a/include/types/proxy.h b/include/types/proxy.h
index 3e0c3ee..719c8dd 100644
--- a/include/types/proxy.h
+++ b/include/types/proxy.h
@@ -239,6 +239,9 @@
 					 * code even though they are not checks. This structure
 					 * is as a parameter to the check code.
 					 * Each check corresponds to a mailer */
+#ifdef USE_THREAD
+	HA_SPINLOCK_T lock;
+#endif
 };
 
 struct proxy {