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 1f8df12c99..7b398250fb 100644
--- a/transport-native-epoll/src/main/c/netty_epoll_native.c
+++ b/transport-native-epoll/src/main/c/netty_epoll_native.c
@@ -624,7 +624,7 @@ jint JNI_OnLoad_netty_transport_native_epoll(JavaVM* vm, void* reserved) {
 }
 
 #ifndef NETTY_BUILD_STATIC
-jint JNI_OnLoad(JavaVM* vm, void* reserved) {
+JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
     return JNI_OnLoad_netty_transport_native_epoll(vm, reserved);
 }
 #endif /* NETTY_BUILD_STATIC */
@@ -640,7 +640,7 @@ void JNI_OnUnload_netty_transport_native_epoll(JavaVM* vm, void* reserved) {
 }
 
 #ifndef NETTY_BUILD_STATIC
-void JNI_OnUnload(JavaVM* vm, void* reserved) {
+JNIEXPORT void JNI_OnUnload(JavaVM* vm, void* reserved) {
   JNI_OnUnload_netty_transport_native_epoll(vm, reserved);
 }
 #endif /* NETTY_BUILD_STATIC */
diff --git a/transport-native-kqueue/src/main/c/netty_kqueue_native.c b/transport-native-kqueue/src/main/c/netty_kqueue_native.c
index 710b7b31c6..94899e037e 100644
--- a/transport-native-kqueue/src/main/c/netty_kqueue_native.c
+++ b/transport-native-kqueue/src/main/c/netty_kqueue_native.c
@@ -352,7 +352,7 @@ jint JNI_OnLoad_netty_transport_native_kqueue(JavaVM* vm, void* reserved) {
 }
 
 #ifndef NETTY_BUILD_STATIC
-jint JNI_OnLoad(JavaVM* vm, void* reserved) {
+JNIEXPORT jint JNI_OnLoad(JavaVM* vm, void* reserved) {
     return JNI_OnLoad_netty_transport_native_kqueue(vm, reserved);
 }
 #endif /* NETTY_BUILD_STATIC */
@@ -368,7 +368,7 @@ void JNI_OnUnload_netty_transport_native_kqueue(JavaVM* vm, void* reserved) {
 }
 
 #ifndef NETTY_BUILD_STATIC
-void JNI_OnUnload(JavaVM* vm, void* reserved) {
+JNIEXPORT void JNI_OnUnload(JavaVM* vm, void* reserved) {
     return JNI_OnUnload_netty_transport_native_kqueue(vm, reserved);
 }
 #endif /* NETTY_BUILD_STATIC */