diff --git a/contrib/vcpkg/portfile.cmake b/contrib/vcpkg/portfile.cmake
index 69661526..b59c3675 100644
--- a/contrib/vcpkg/portfile.cmake
+++ b/contrib/vcpkg/portfile.cmake
@@ -4,8 +4,8 @@ vcpkg_from_github(
   HEAD_REF master
 
   # The "REF" can be a commit hash, branch name (dev2), or a version (v2.2.1).
-  # REF "v${VERSION}"
-  REF 866ce5b89db1dbc3e66bbf89041291fd16329518
+  REF "v${VERSION}"
+  # REF 866ce5b89db1dbc3e66bbf89041291fd16329518
 
   # The sha512 is the hash of the tar.gz bundle.
   # (To get the sha512, run `vcpkg install mimalloc[override] --overlay-ports=<dir of this file>` and copy the sha from the error message.)
@@ -19,6 +19,7 @@ vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS
     secure      MI_SECURE
     override    MI_OVERRIDE
     optarch     MI_OPT_ARCH
+    nooptarch   MI_NO_OPT_ARCH
     optsimd     MI_OPT_SIMD
     xmalloc     MI_XMALLOC
     asm         MI_SEE_ASM
diff --git a/contrib/vcpkg/vcpkg.json b/contrib/vcpkg/vcpkg.json
index 45f8097b..b38555a1 100644
--- a/contrib/vcpkg/vcpkg.json
+++ b/contrib/vcpkg/vcpkg.json
@@ -1,6 +1,6 @@
 {
   "name": "mimalloc",
-  "version": "1.9.2",
+  "version": "1.9.4",
   "port-version": 2,
   "description": "Compact general purpose allocator with excellent performance",
   "homepage": "https://github.com/microsoft/mimalloc",
@@ -35,6 +35,9 @@
     "optarch": {
       "description": "Use architecture specific optimizations (on x64: '-march=haswell;-mavx2', on arm64: '-march=armv8.1-a')"
     },
+    "nooptarch": {
+      "description": "Do _not_ use architecture specific optimizations (on x64: '-march=haswell;-mavx2', on arm64: '-march=armv8.1-a')"
+    },
     "optsimd": {
       "description": "Allow use of SIMD instructions (avx2 or neon) (requires 'optarch' to be enabled)"
     },