1 files changed, 6 insertions, 0 deletions
diff --git a/src/mbgl/renderer/render_source.cpp b/src/mbgl/renderer/render_source.cpp
index d0f5689a9e..7b47602cd1 100644
--- a/src/mbgl/renderer/render_source.cpp
+++ b/src/mbgl/renderer/render_source.cpp
@@ -11,6 +11,7 @@
 #include <mbgl/tile/tile.hpp>
 
 #include <mbgl/layermanager/layer_manager.hpp>
+#include <mbgl/util/constants.hpp>
 #include <utility>
 
 namespace mbgl {
@@ -73,4 +74,9 @@ bool RenderSource::isEnabled() const {
     return enabled;
 }
 
+uint8_t RenderSource::getMaxZoom() const { 
+    assert(false);
+    return util::TERRAIN_RGB_MAXZOOM;
+}
+
 } // namespace mbgl