diff --git a/src/options.c b/src/options.c
index c9c92003..89048c7d 100644
--- a/src/options.c
+++ b/src/options.c
@@ -60,7 +60,7 @@ static mi_option_desc_t options[_mi_option_last] =
   { 0, UNINIT, MI_OPTION(verbose) },
 
   // the following options are experimental and not all combinations make sense.
-  { 1, UNINIT, MI_OPTION(eager_commit) },        // commit on demand?
+  { 0, UNINIT, MI_OPTION(eager_commit) },        // commit on demand?
   #if defined(_WIN32) || (MI_INTPTR_SIZE <= 4)   // and other OS's without overcommit?
   { 0, UNINIT, MI_OPTION(eager_region_commit) },
   { 0, UNINIT, MI_OPTION(reset_decommits) },     // reset decommits memory
@@ -79,7 +79,7 @@ static mi_option_desc_t options[_mi_option_last] =
 #else
   { 1, UNINIT, MI_OPTION(eager_commit_delay) },  // the first N segments per thread are not eagerly committed
 #endif
-  { 1, UNINIT, MI_OPTION(allow_decommit) },      // decommit pages when not eager committed
+  { 1,    UNINIT, MI_OPTION(allow_decommit) },    // decommit pages when not eager committed
   { 100,  UNINIT, MI_OPTION(reset_delay) },       // reset delay in milli-seconds
   { 1000, UNINIT, MI_OPTION(arena_reset_delay) }, // reset delay in milli-seconds
   { 0,    UNINIT, MI_OPTION(use_numa_nodes) },    // 0 = use available numa nodes, otherwise use at most N nodes. 
diff --git a/src/segment.c b/src/segment.c
index b8e5f2ec..ed587d5b 100644
--- a/src/segment.c
+++ b/src/segment.c
@@ -671,7 +671,8 @@ static mi_segment_t* mi_segment_init(mi_segment_t* segment, size_t required, mi_
     if (!commit) {
       // at least commit the info slices
       mi_assert_internal(MI_COMMIT_SIZE > info_slices*MI_SEGMENT_SLICE_SIZE);
-      _mi_os_commit(segment, MI_COMMIT_SIZE, &is_zero, tld->stats);
+      bool ok = _mi_os_commit(segment, MI_COMMIT_SIZE, &is_zero, tld->stats);
+      if (!ok) return NULL; // failed to commit
     }
     segment->memid = memid;
     segment->mem_is_fixed = mem_large;