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-rw-r--r--include/mbgl/style/conversion/transition_options.hpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/mbgl/style/conversion/transition_options.hpp b/include/mbgl/style/conversion/transition_options.hpp
index 0563f39ac3..a72d757d3c 100644
--- a/include/mbgl/style/conversion/transition_options.hpp
+++ b/include/mbgl/style/conversion/transition_options.hpp
@@ -2,6 +2,7 @@
#include <mbgl/style/transition_options.hpp>
#include <mbgl/style/conversion.hpp>
+#include <mbgl/util/optional.hpp>
namespace mbgl {
namespace style {