diff --git a/src/nxt_application.h b/src/nxt_application.h
index 2675e6a0..4efe3750 100644
--- a/src/nxt_application.h
+++ b/src/nxt_application.h
@@ -21,6 +21,7 @@ typedef enum {
     NXT_APP_PERL,
     NXT_APP_RUBY,
     NXT_APP_JAVA,
+    NXT_APP_WASM,
 
     NXT_APP_UNKNOWN,
 } nxt_app_type_t;
diff --git a/src/nxt_router.c b/src/nxt_router.c
index 5d9c60a1..4e3cb303 100644
--- a/src/nxt_router.c
+++ b/src/nxt_router.c
@@ -280,6 +280,7 @@ static const nxt_str_t  *nxt_app_msg_prefix[] = {
     [NXT_APP_PERL]      = &http_prefix,
     [NXT_APP_RUBY]      = &http_prefix,
     [NXT_APP_JAVA]      = &empty_prefix,
+    [NXT_APP_WASM]      = &empty_prefix,
 };