diff --git a/src/tint/writer/syntax_tree/generator_impl.cc b/src/tint/writer/syntax_tree/generator_impl.cc
index e5e2f2f..87d182e 100644
--- a/src/tint/writer/syntax_tree/generator_impl.cc
+++ b/src/tint/writer/syntax_tree/generator_impl.cc
@@ -34,6 +34,7 @@
 #include "src/tint/ast/workgroup_attribute.h"
 #include "src/tint/sem/struct.h"
 #include "src/tint/sem/switch_statement.h"
+#include "src/tint/switch.h"
 #include "src/tint/utils/math.h"
 #include "src/tint/utils/scoped_assignment.h"
 #include "src/tint/writer/float_to_string.h"