diff --git a/direct/src/dcparser/dcParameter.cxx b/direct/src/dcparser/dcParameter.cxx
index df2a132654..f30d132683 100644
--- a/direct/src/dcparser/dcParameter.cxx
+++ b/direct/src/dcparser/dcParameter.cxx
@@ -216,5 +216,7 @@ generate_hash(HashGenerator &hashgen) const {
   // We specifically don't call up to DCField::generate_hash(), since
   // the parameter name is not actually significant to the hash.
 
-  //  hashgen.add_int(get_flags());
+  if (get_flags() != 0) {
+    hashgen.add_int(get_flags());
+  }
 }
diff --git a/direct/src/dcparser/dcSwitch.h b/direct/src/dcparser/dcSwitch.h
index 667a5dfd4b..f1bff04117 100644
--- a/direct/src/dcparser/dcSwitch.h
+++ b/direct/src/dcparser/dcSwitch.h
@@ -21,6 +21,11 @@
 
 #include "dcbase.h"
 #include "dcDeclaration.h"
+#include "dcPackerInterface.h"
+
+class DCParameter;
+class HashGenerator;
+class DCField;
 
 ////////////////////////////////////////////////////////////////////
 //       Class : DCSwitch