diff --git a/transport-native-epoll/src/main/c/netty_epoll_native.c b/transport-native-epoll/src/main/c/netty_epoll_native.c
index 13378ac8ba..7367f0bed2 100644
--- a/transport-native-epoll/src/main/c/netty_epoll_native.c
+++ b/transport-native-epoll/src/main/c/netty_epoll_native.c
@@ -636,7 +636,9 @@ static jint netty_epoll_native_uioMaxIov(JNIEnv* env, jclass clazz) {
 }
 
 static jboolean netty_epoll_native_isSupportingSendmmsg(JNIEnv* env, jclass clazz) {
-    if (sendmmsg) {
+    // Use & to avoid warnings with -Wtautological-pointer-compare when sendmmsg is
+    // not weakly defined.
+    if (&sendmmsg != NULL) {
         return JNI_TRUE;
     }
     return JNI_FALSE;