diff --git a/README.md b/README.md
index b2c265f6c9..d5199a1fa8 100644
--- a/README.md
+++ b/README.md
@@ -32,10 +32,13 @@ Note that you can
 
 ##### Windows
 
- * cmake >= 2.8.5
- * Microsoft Visual Studio 2017 (version 15.8)
- * LLVM, Clang, LLD development libraries == 9.x, compiled with the same MSVC version above
-   - Use the [pre-built binaries](https://github.com/ziglang/zig/wiki/How-to-build-LLVM,-libclang,-and-liblld-from-source#pre-built-binaries) or [build from source](https://github.com/ziglang/zig/wiki/How-to-build-LLVM,-libclang,-and-liblld-from-source#windows).
+ * cmake >= 3.15.3
+ * Microsoft Visual Studio. Supported versions:
+   - 2015 (version 14)
+   - 2017 (version 15.8)
+   - 2019 (version 16)
+ * LLVM, Clang, LLD development libraries == 9.x
+   - Use the [pre-built binaries](https://github.com/ziglang/zig/wiki/Building-Zig-on-Windows) or [build from source](https://github.com/ziglang/zig/wiki/How-to-build-LLVM,-libclang,-and-liblld-from-source#windows).
 
 #### Instructions
 
diff --git a/std/special/compiler_rt/muldi3.zig b/std/special/compiler_rt/muldi3.zig
index 7a955120f5..7700777c16 100644
--- a/std/special/compiler_rt/muldi3.zig
+++ b/std/special/compiler_rt/muldi3.zig
@@ -1,7 +1,7 @@
 const builtin = @import("builtin");
 
 // Ported from
-// https://github.com/llvm/llvm-project/blob/552c2c09d354a3ad9c1c9647e0a3bb5099c31088/compiler-rt/lib/builtins/muldi3.c
+// https://github.com/llvm/llvm-project/blob/llvmorg-9.0.0/compiler-rt/lib/builtins/muldi3.c
 
 const dwords = extern union {
     all: i64,