diff --git a/include/types/action.h b/include/types/action.h
index 0367ea9..6c5fccf 100644
--- a/include/types/action.h
+++ b/include/types/action.h
@@ -108,6 +108,13 @@
 	struct applet applet;                  /* used for the applet registration. */
 	union {
 		struct {
+			struct sample_expr *expr;
+			char *varname;
+			char *resolvers_id;
+			struct dns_resolvers *resolvers;
+			struct dns_options dns_opts;
+		} dns;                        /* dns resolution */
+		struct {
 			char *realm;
 		} auth;                        /* arg used by "auth" */
 		struct {
diff --git a/include/types/stats.h b/include/types/stats.h
index 043c377..648b032 100644
--- a/include/types/stats.h
+++ b/include/types/stats.h
@@ -312,6 +312,7 @@
 	INF_CONNECTED_PEERS,
 	INF_DROPPED_LOGS,
 	INF_BUSY_POLLING,
+	INF_FAILED_RESOLUTIONS,
 
 	/* must always be the last one */
 	INF_TOTAL_FIELDS
diff --git a/include/types/stream.h b/include/types/stream.h
index b6a3e84..96a0345 100644
--- a/include/types/stream.h
+++ b/include/types/stream.h
@@ -180,6 +180,15 @@
 	struct list *current_rule_list;         /* this is used to store the current executed rule list. */
 	void *current_rule;                     /* this is used to store the current rule to be resumed. */
 	struct hlua *hlua;                      /* lua runtime context */
+
+	/* Context */
+	struct {
+		struct dns_requester *dns_requester; /* owner of the resolution */
+		char *hostname_dn;              /* hostname being resolve, in domain name format */
+		int hostname_dn_len;            /* size of hostname_dn */
+		/* 4 unused bytes here */
+		struct act_rule *parent;        /* rule which requested this resolution */
+	} dns_ctx;                              /* context information for DNS resolution */
 };
 
 #endif /* _TYPES_STREAM_H */