diff --git a/tz.h b/tz.h
index 97b6c60..2476cc4 100644
--- a/tz.h
+++ b/tz.h
@@ -134,7 +134,11 @@ static_assert(HAS_REMOTE_API == 0 ? AUTO_DOWNLOAD == 0 : true,
 #    define DATE_API
 #  endif
 #else
-#  define DATE_API
+#  ifdef DATE_BUILD_DLL
+#    define DATE_API __attribute__ ((visibility ("default")))
+#  else
+#    define DATE_API
+#  endif
 #endif
 
 namespace date