diff --git a/include/uv.h b/include/uv.h
index ba93e07c..f0f1ff33 100644
--- a/include/uv.h
+++ b/include/uv.h
@@ -41,8 +41,9 @@ extern "C" {
 #   define UV_EXTERN /* nothing */
 #   define CARES_STATICLIB 1
 # endif
+#elif __GNUC__ >= 4
+# define UV_EXTERN __attribute__((visibility("default")))
 #else
-  /* Unix. TODO: symbol hiding */
 # define UV_EXTERN /* nothing */
 #endif