diff --git a/ports/openssl/vcpkg.json b/ports/openssl/vcpkg.json
index 32ff26c6ca9ad9..d222c35eafbc56 100644
--- a/ports/openssl/vcpkg.json
+++ b/ports/openssl/vcpkg.json
@@ -1,6 +1,7 @@
 {
   "name": "openssl",
   "version": "3.6.5",
+  "port-version": 1,
   "description": "OpenSSL is an open source project that provides a robust, commercial-grade, and full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. It is also a general-purpose cryptography library.",
   "homepage": "https://www.openssl.org",
   "license": "Apache-2.0",
diff --git a/ports/openssl/windows/portfile.cmake b/ports/openssl/windows/portfile.cmake
index e02db484bd73c2..f89956eede9406 100644
--- a/ports/openssl/windows/portfile.cmake
+++ b/ports/openssl/windows/portfile.cmake
@@ -24,6 +24,12 @@ elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64")
     else()
         set(OPENSSL_ARCH VC-WIN64-CLANGASM-ARM)
     endif()
+elseif(VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64ec")
+    # OpenSSL has no ARM64EC target (https://github.com/openssl/openssl/issues/16482).
+    # The toolchain flags (/arm64EC, /machine:ARM64EC) make this ARM64 target build ARM64EC code.
+    # OpenSSL's ARM64 assembly uses registers that the ARM64EC ABI reserves, so it must stay disabled.
+    set(OPENSSL_ARCH VC-WIN64-ARM)
+    vcpkg_list(APPEND CONFIGURE_OPTIONS no-asm)
 else()
     message(FATAL_ERROR "Unsupported target architecture: ${VCPKG_TARGET_ARCHITECTURE}")
 endif()
diff --git a/versions/baseline.json b/versions/baseline.json
index b7b86604a71640..b95eb3bb870a34 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -7586,7 +7586,7 @@
     },
     "openssl": {
       "baseline": "3.6.5",
-      "port-version": 0
+      "port-version": 1
     },
     "opensubdiv": {
       "baseline": "3.5.0",
diff --git a/versions/o-/openssl.json b/versions/o-/openssl.json
index 1a5f7536431b45..7d98c20f9d00d3 100644
--- a/versions/o-/openssl.json
+++ b/versions/o-/openssl.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "e4315229b7682bd886132fa1b1d68217db887098",
+      "version": "3.6.5",
+      "port-version": 1
+    },
     {
       "git-tree": "ab6768c10c3809e9b2b97612fe84566ad1c7f4a7",
       "version": "3.6.5",