diff --git a/include/mimalloc.h b/include/mimalloc.h
index b63ed79d..a9c339e9 100644
--- a/include/mimalloc.h
+++ b/include/mimalloc.h
@@ -261,7 +261,6 @@ typedef enum mi_option_e {
   mi_option_verbose,
   // the following options are experimental
   mi_option_eager_commit,
-  mi_option_eager_region_commit,
   mi_option_large_os_pages,         // implies eager commit
   mi_option_reserve_huge_os_pages,
   mi_option_segment_cache,
@@ -269,6 +268,7 @@ typedef enum mi_option_e {
   mi_option_cache_reset,
   mi_option_reset_decommits,
   mi_option_eager_commit_delay,
+  mi_option_allow_decommit,
   mi_option_segment_reset,
   mi_option_os_tag,
   _mi_option_last
diff --git a/src/options.c b/src/options.c
index 99e90c46..31af819b 100644
--- a/src/options.c
+++ b/src/options.c
@@ -53,11 +53,6 @@ static mi_option_desc_t options[_mi_option_last] =
 
   // the following options are experimental and not all combinations make sense.
   { 1, UNINIT, MI_OPTION(eager_commit) },        // note: needs to be on when eager_region_commit is enabled
-  #ifdef _WIN32   // and BSD?
-  { 0, UNINIT, MI_OPTION(eager_region_commit) }, // don't commit too eagerly on windows (just for looks...)
-  #else
-  { 1, UNINIT, MI_OPTION(eager_region_commit) }, 
-  #endif
   { 0, UNINIT, MI_OPTION(large_os_pages) },      // use large OS pages, use only with eager commit to prevent fragmentation of VMA's
   { 0, UNINIT, MI_OPTION(reserve_huge_os_pages) },
   { 0, UNINIT, MI_OPTION(segment_cache) },       // cache N segments per thread
@@ -65,6 +60,7 @@ static mi_option_desc_t options[_mi_option_last] =
   { 0, UNINIT, MI_OPTION(cache_reset) },
   { 0, UNINIT, MI_OPTION(reset_decommits) },     // note: cannot enable this if secure is on
   { 0, UNINIT, MI_OPTION(eager_commit_delay) },  // the first N segments per thread are not eagerly committed
+  { 0, UNINIT, MI_OPTION(allow_decommit) },      // decommit pages when not eager committed
   { 0, UNINIT, MI_OPTION(segment_reset) },       // reset segment memory on free (needs eager commit)
   { 100, UNINIT, MI_OPTION(os_tag) }             // only apple specific for now but might serve more or less related purpose
 };
diff --git a/src/segment.c b/src/segment.c
index 8a02acac..41cf08d9 100644
--- a/src/segment.c
+++ b/src/segment.c
@@ -634,7 +634,7 @@ static mi_segment_t* mi_segment_alloc(size_t required, mi_segments_tld_t* tld, m
   segment->cookie = _mi_ptr_cookie(segment);
   segment->slice_entries = slice_entries;
   segment->kind = (required == 0 ? MI_SEGMENT_NORMAL : MI_SEGMENT_HUGE);
-  segment->allow_decommit = !commit;
+  segment->allow_decommit = !commit && mi_option_is_enabled(mi_option_allow_decommit);
   segment->commit_mask = (!commit ? 0x01 : ~((uintptr_t)0)); // on lazy commit, the initial part is always committed
   // memset(segment->slices, 0, sizeof(mi_slice_t)*(info_slices+1));
   _mi_stat_increase(&tld->stats->page_committed, mi_segment_info_size(segment));