diff --git a/include/private/SkPathRef.h b/include/private/SkPathRef.h
index 7afe4f9..502f83e 100644
--- a/include/private/SkPathRef.h
+++ b/include/private/SkPathRef.h
@@ -21,6 +21,7 @@
 
 #include <atomic>
 #include <limits>
+#include <tuple>
 
 class SkRBuffer;
 class SkWBuffer;