diff --git a/libc-test/semver/emscripten.txt b/libc-test/semver/emscripten.txt
index dc9e6b4f3b52d..35f7d85de5181 100644
--- a/libc-test/semver/emscripten.txt
+++ b/libc-test/semver/emscripten.txt
@@ -6,4 +6,5 @@ getgrnam
 getgrnam_r
 getpwnam_r
 getpwuid_r
+in6_pktinfo
 posix_fallocate64
diff --git a/src/unix/linux_like/emscripten/mod.rs b/src/unix/linux_like/emscripten/mod.rs
index 29b16c77e96bd..f3fd341ef304c 100644
--- a/src/unix/linux_like/emscripten/mod.rs
+++ b/src/unix/linux_like/emscripten/mod.rs
@@ -212,6 +212,11 @@ s! {
         pub cmsg_type: c_int,
     }
 
+    pub struct in6_pktinfo {
+        pub ipi6_addr: crate::in6_addr,
+        pub ipi6_ifindex: c_uint,
+    }
+
     pub struct sem_t {
         __val: [c_int; 4],
     }