diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index ca846b3..e87b044 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -19,6 +19,7 @@
 
 #include "locations.h"
 #include "offsets.h"
+#include "primitive.h"
 #include "utils/allocation.h"
 #include "utils/arena_bit_vector.h"
 #include "utils/growable_array.h"