diff --git a/include/types/applet.h b/include/types/applet.h
index 2e1626a..562575f 100644
--- a/include/types/applet.h
+++ b/include/types/applet.h
@@ -133,6 +133,9 @@
 		struct {
 			struct proxy *backend;
 		} server_state;
+		struct {
+			char **var;
+		} env;
 	} ctx;					/* used by stats I/O handlers to dump the stats */
 };