diff --git a/src/prim/unix/prim.c b/src/prim/unix/prim.c
index 335c99e7..b64f0173 100644
--- a/src/prim/unix/prim.c
+++ b/src/prim/unix/prim.c
@@ -391,9 +391,11 @@ int _mi_prim_decommit(void* start, size_t size, bool* needs_recommit) {
 }
 
 int _mi_prim_reset(void* start, size_t size) {
-  // We always use MADV_DONTNEED if possible even if it may be a bit more expensive as MADV_FREE
-  // as this guarantees that we see the actual rss reflected in tools like `top`.
-  #if 0 && defined(MADV_FREE)
+  // We try to use `MADV_FREE` as that is the fastest. A drawback though is that it 
+  // will not reduce the `rss` stats in tools like `top` even though the memory is available
+  // to other processes. With the default `MIMALLOC_PURGE_DECOMMITS=1` we ensure that by 
+  // default `MADV_DONTNEED` is used though.
+  #if defined(MADV_FREE)
   static _Atomic(size_t) advice = MI_ATOMIC_VAR_INIT(MADV_FREE);
   int oadvice = (int)mi_atomic_load_relaxed(&advice);
   int err;
diff --git a/src/prim/windows/prim.c b/src/prim/windows/prim.c
index bde48a7d..e6b61079 100644
--- a/src/prim/windows/prim.c
+++ b/src/prim/windows/prim.c
@@ -285,9 +285,9 @@ int _mi_prim_decommit(void* addr, size_t size, bool* needs_recommit) {
 int _mi_prim_reset(void* addr, size_t size) {
   void* p = VirtualAlloc(addr, size, MEM_RESET, PAGE_READWRITE);
   mi_assert_internal(p == addr);
-  #if 1
+  #if 0
   if (p != NULL) {
-    VirtualUnlock(addr,size); // VirtualUnlock after MEM_RESET removes the memory from the working set
+    VirtualUnlock(addr,size); // VirtualUnlock after MEM_RESET removes the memory directly from the working set
   }
   #endif
   return (p != NULL ? 0 : (int)GetLastError());