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-rw-r--r--include/mbgl/util/constants.hpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/mbgl/util/constants.hpp b/include/mbgl/util/constants.hpp
index 7110d9e26b..6ac9280fba 100644
--- a/include/mbgl/util/constants.hpp
+++ b/include/mbgl/util/constants.hpp
@@ -39,6 +39,7 @@ constexpr double MAX_ZOOM = 25.5;
constexpr float MIN_ZOOM_F = MIN_ZOOM;
constexpr float MAX_ZOOM_F = MAX_ZOOM;
constexpr uint8_t DEFAULT_MAX_ZOOM = 22;
+constexpr float ONE_EM = 24.0f;
constexpr uint8_t DEFAULT_PREFETCH_ZOOM_DELTA = 4;