diff --git a/src/sem/intrinsic_type.h.tmpl b/src/sem/intrinsic_type.h.tmpl
index deb935c..2833e20 100644
--- a/src/sem/intrinsic_type.h.tmpl
+++ b/src/sem/intrinsic_type.h.tmpl
@@ -11,8 +11,8 @@
 #ifndef SRC_SEM_INTRINSIC_TYPE_H_
 #define SRC_SEM_INTRINSIC_TYPE_H_
 
-#include <string>
 #include <sstream>
+#include <string>
 
 namespace tint {
 namespace sem {