diff --git a/include/llvm/Support/InstVisitor.h b/include/llvm/Support/InstVisitor.h
index 8b3a28d5f93..4af9256dcf7 100644
--- a/include/llvm/Support/InstVisitor.h
+++ b/include/llvm/Support/InstVisitor.h
@@ -51,11 +51,10 @@
 #define LLVM_SUPPORT_INSTVISITOR_H
 
 #include "llvm/Function.h"
+#include "llvm/Module.h"
 
 namespace llvm {
 
-class Module;
-
 // We operate on opaque instruction classes, so forward declare all instruction
 // types now...
 //