diff --git a/src/mbgl/layout/symbol_layout.cpp b/src/mbgl/layout/symbol_layout.cpp
index 07ba2bf4a3f..a7107ef958e 100644
--- a/src/mbgl/layout/symbol_layout.cpp
+++ b/src/mbgl/layout/symbol_layout.cpp
@@ -515,8 +515,8 @@ void SymbolLayout::addToDebugBuffers(CollisionTile& collisionTile, SymbolBucket&
                 bl = util::matrixMultiply(collisionTile.reverseRotationMatrix, bl);
                 br = util::matrixMultiply(collisionTile.reverseRotationMatrix, br);
 
-                const float maxZoom = util::clamp(zoom + log(box.maxScale) / log(2), util::MIN_ZOOM, util::MAX_ZOOM);
-                const float placementZoom = util::clamp(zoom + log(box.placementScale) / log(2), util::MIN_ZOOM, util::MAX_ZOOM);
+                const float maxZoom = util::clamp(zoom + util::log2(box.maxScale), util::MIN_ZOOM, util::MAX_ZOOM);
+                const float placementZoom = util::clamp(zoom + util::log2(box.placementScale), util::MIN_ZOOM, util::MAX_ZOOM);
 
                 collisionBox.vertices.emplace_back(anchor.x, anchor.y, tl.x, tl.y, maxZoom, placementZoom);
                 collisionBox.vertices.emplace_back(anchor.x, anchor.y, tr.x, tr.y, maxZoom, placementZoom);
diff --git a/src/mbgl/map/transform_state.cpp b/src/mbgl/map/transform_state.cpp
index 4f6bcecdb6c..1dacdf8fc37 100644
--- a/src/mbgl/map/transform_state.cpp
+++ b/src/mbgl/map/transform_state.cpp
@@ -120,7 +120,7 @@ double TransformState::pixel_y() const {
 #pragma mark - Zoom
 
 double TransformState::getZoom() const {
-    return std::log(scale) / M_LN2;
+    return scaleZoom(scale);
 }
 
 int32_t TransformState::getIntegerZoom() const {