diff --git a/docs/ExtendingLLVM.html b/docs/ExtendingLLVM.html
index d40b18f8482..9b0a487f82e 100644
--- a/docs/ExtendingLLVM.html
+++ b/docs/ExtendingLLVM.html
@@ -266,7 +266,7 @@ installations.</span> Only add new types if it is absolutely necessary.</p>
     add enum for the new type; add a forward declaration of the type
     also</li>
 
-<li><tt>llvm/include/llvm/DerivedType.h</tt>:
+<li><tt>llvm/include/llvm/DerivedTypes.h</tt>:
     add new class to represent new class in the hierarchy; add forward 
     declaration to the TypeMap value type</li>