diff --git a/src/google/protobuf/wire_format_unittest.inc b/src/google/protobuf/wire_format_unittest.inc
index 631a962cdfd4..9efcd2e4414e 100644
--- a/src/google/protobuf/wire_format_unittest.inc
+++ b/src/google/protobuf/wire_format_unittest.inc
@@ -49,6 +49,8 @@
 #include <google/protobuf/stubs/casts.h>
 #include <google/protobuf/stubs/strutil.h>
 #include <google/protobuf/stubs/stl_util.h>
+#include <google/protobuf/dynamic_message.h>
+
 
 // clang-format off
 #include <google/protobuf/port_def.inc>