diff --git a/docs/LangRef.html b/docs/LangRef.html
index 1786e657cb7..68d65f1a972 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -7506,7 +7506,7 @@ LLVM</a>.</p>
 
 <h5>Syntax:</h5>
 <pre>
-  declare {}* @llvm.invariant.start(i64 &lt;size&gt;, i8* nocapture &lt;ptr&gt;) readonly
+  declare {}* @llvm.invariant.start(i64 &lt;size&gt;, i8* nocapture &lt;ptr&gt;)
 </pre>
 
 <h5>Overview:</h5>
diff --git a/include/llvm/Intrinsics.td b/include/llvm/Intrinsics.td
index 347541f71f1..addb6df7d49 100644
--- a/include/llvm/Intrinsics.td
+++ b/include/llvm/Intrinsics.td
@@ -436,7 +436,7 @@ def int_lifetime_end    : Intrinsic<[],
                                     [IntrReadWriteArgMem, NoCapture<1>]>;
 def int_invariant_start : Intrinsic<[llvm_descriptor_ty],
                                     [llvm_i64_ty, llvm_ptr_ty],
-                                    [IntrReadArgMem, NoCapture<1>]>;
+                                    [IntrReadWriteArgMem, NoCapture<1>]>;
 def int_invariant_end   : Intrinsic<[],
                                     [llvm_descriptor_ty, llvm_i64_ty,
                                      llvm_ptr_ty],