diff --git a/ports/mimalloc/fix-param.patch b/ports/mimalloc/fix-param.patch
new file mode 100644
index 0000000000..e4c40afca0
--- /dev/null
+++ b/ports/mimalloc/fix-param.patch
@@ -0,0 +1,13 @@
+diff --git a/src/arena.c b/src/arena.c
+index 648ee84..ee55989 100644
+--- a/src/arena.c
++++ b/src/arena.c
+@@ -794,7 +794,7 @@ bool _mi_arena_segment_clear_abandoned(mi_segment_t* segment )
+ // clears the thread_id.
+ void _mi_arena_segment_mark_abandoned(mi_segment_t* segment) 
+ {
+-  mi_atomic_store_release(&segment->thread_id, 0);
++  mi_atomic_store_release(&segment->thread_id, (uintptr_t)0);
+   mi_assert_internal(segment->used == segment->abandoned);
+   if (segment->memid.memkind != MI_MEM_ARENA) {
+     // not in an arena; count it as abandoned and return
diff --git a/ports/mimalloc/portfile.cmake b/ports/mimalloc/portfile.cmake
index 38fdd79acf..1b569f14f4 100644
--- a/ports/mimalloc/portfile.cmake
+++ b/ports/mimalloc/portfile.cmake
@@ -7,6 +7,7 @@ vcpkg_from_github(
     PATCHES
         fix-cmake.patch
         add_ref_to_page_malloc_zero.patch
+        fix-param.patch
 )
 
 vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS
diff --git a/ports/mimalloc/vcpkg.json b/ports/mimalloc/vcpkg.json
index 7bd68d2540..2a6c73211a 100644
--- a/ports/mimalloc/vcpkg.json
+++ b/ports/mimalloc/vcpkg.json
@@ -1,6 +1,7 @@
 {
   "name": "mimalloc",
   "version": "2.1.7",
+  "port-version": 1,
   "description": "Compact general purpose allocator with excellent performance",
   "homepage": "https://github.com/microsoft/mimalloc",
   "license": "MIT",
diff --git a/versions/baseline.json b/versions/baseline.json
index 02b6abad2f..b0d7f52f97 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -5910,7 +5910,7 @@
     },
     "mimalloc": {
       "baseline": "2.1.7",
-      "port-version": 0
+      "port-version": 1
     },
     "mimicpp": {
       "baseline": "4",
diff --git a/versions/m-/mimalloc.json b/versions/m-/mimalloc.json
index d6764267c9..164863a418 100644
--- a/versions/m-/mimalloc.json
+++ b/versions/m-/mimalloc.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "7c5bd4a682e8abd9ad95f184c32040d4fed94dfb",
+      "version": "2.1.7",
+      "port-version": 1
+    },
     {
       "git-tree": "36add89e108365f4632d31d0ff7cc877101a9fad",
       "version": "2.1.7",