diff --git a/llvm/include/llvm/Intrinsics.h b/llvm/include/llvm/Intrinsics.h
index a1deb5f3d694..ed1a04b7e229 100644
--- a/llvm/include/llvm/Intrinsics.h
+++ b/llvm/include/llvm/Intrinsics.h
@@ -9,6 +9,10 @@
 #ifndef LLVM_INTRINSICS_H
 #define LLVM_INTRINSICS_H
 
+/// LLVMIntrinsic Namespace - This namespace contains an enum with a value for
+/// every intrinsic/builtin function known by LLVM.  These enum values are
+/// returned by Function::getIntrinsicID().
+///
 namespace LLVMIntrinsic {
   enum ID {
     not_intrinsic = 0,   // Must be zero