diff --git a/src/draco/scene/instance_array.h b/src/draco/scene/instance_array.h
index ff1daab..fb1fbde 100644
--- a/src/draco/scene/instance_array.h
+++ b/src/draco/scene/instance_array.h
@@ -19,6 +19,7 @@
 
 #ifdef DRACO_TRANSCODER_SUPPORTED
 #include <string>
+#include <vector>
 
 #include "draco/core/vector_d.h"
 #include "draco/scene/trs_matrix.h"