diff --git a/include/mimalloc/internal.h b/include/mimalloc/internal.h
index 63e19a34..e83186e8 100644
--- a/include/mimalloc/internal.h
+++ b/include/mimalloc/internal.h
@@ -38,6 +38,12 @@ terms of the MIT license. A copy of the license can be found in the file
 #define mi_decl_align(a)        __attribute__((aligned(a)))
 #define mi_decl_weak            __attribute__((weak))
 #define mi_decl_hidden          __attribute__((visibility("hidden")))
+#elif __cplusplus >= 201103L    // c++11
+#define mi_decl_noinline
+#define mi_decl_thread          thread_local
+#define mi_decl_cache_align     alignas(MI_CACHE_LINE)
+#define mi_decl_weak
+#define mi_decl_hidden
 #else
 #define mi_decl_noinline
 #define mi_decl_thread          __thread        // hope for the best :-)
diff --git a/include/mimalloc/types.h b/include/mimalloc/types.h
index 8d05c110..1ca48e80 100644
--- a/include/mimalloc/types.h
+++ b/include/mimalloc/types.h
@@ -99,6 +99,10 @@ terms of the MIT license. A copy of the license can be found in the file
 #define MI_ENCODE_FREELIST  1
 #endif
 
+// Enable large pages for objects between 128KiB and 512KiB. Disabled by default.
+#ifndef MI_ENABLE_LARGE_PAGES
+#define MI_ENABLE_LARGE_PAGES  0
+#endif
 
 // --------------------------------------------------------------
 // Sizes of internal data-structures
@@ -131,6 +135,7 @@ terms of the MIT license. A copy of the license can be found in the file
 #define MI_MEDIUM_PAGE_SIZE               (8*MI_SMALL_PAGE_SIZE)                   // 512 KiB  (=byte in the bchunk bitmap)
 #define MI_LARGE_PAGE_SIZE                (MI_SIZE_SIZE*MI_MEDIUM_PAGE_SIZE)       // 4 MiB    (=word in the bchunk bitmap)
 
+
 // Maximum number of size classes. (spaced exponentially in 12.5% increments)
 #define MI_BIN_HUGE  (73U)
 #define MI_BIN_FULL  (MI_BIN_HUGE+1)
@@ -328,8 +333,14 @@ typedef struct mi_page_s {
 // The max object size are checked to not waste more than 12.5% internally over the page sizes.
 // (Except for large pages since huge objects are allocated in 4MiB chunks)
 #define MI_SMALL_MAX_OBJ_SIZE             ((MI_SMALL_PAGE_SIZE-MI_PAGE_INFO_SIZE)/8)   // < 8 KiB
-#define MI_MEDIUM_MAX_OBJ_SIZE            ((MI_MEDIUM_PAGE_SIZE-MI_PAGE_INFO_SIZE)/8)  // < 64 KiB
-#define MI_LARGE_MAX_OBJ_SIZE             (MI_LARGE_PAGE_SIZE/4)   // <= 512 KiB // note: this must be a nice power of 2 or we get rounding issues with `_mi_bin`
+
+#if MI_ENABLE_LARGE_PAGES
+#define MI_MEDIUM_MAX_OBJ_SIZE            (MI_MEDIUM_PAGE_SIZE-MI_PAGE_INFO_SIZE)/8)   // < 64 KiB
+#define MI_LARGE_MAX_OBJ_SIZE             (MI_LARGE_PAGE_SIZE/4)    // <= 512 KiB // note: this must be a nice power of 2 or we get rounding issues with `_mi_bin`
+#else
+#define MI_MEDIUM_MAX_OBJ_SIZE            (MI_MEDIUM_PAGE_SIZE/8)   // <= 64 KiB
+#define MI_LARGE_MAX_OBJ_SIZE             MI_MEDIUM_MAX_OBJ_SIZE
+#endif
 #define MI_LARGE_MAX_OBJ_WSIZE            (MI_LARGE_MAX_OBJ_SIZE/MI_SIZE_SIZE)
 
 
diff --git a/src/arena.c b/src/arena.c
index b16d5679..68ed5e2f 100644
--- a/src/arena.c
+++ b/src/arena.c
@@ -773,9 +773,9 @@ mi_page_t* _mi_arenas_page_alloc(mi_heap_t* heap, size_t block_size, size_t bloc
   else if (block_size <= MI_MEDIUM_MAX_OBJ_SIZE) {
     page = mi_arenas_page_regular_alloc(heap, mi_slice_count_of_size(MI_MEDIUM_PAGE_SIZE), block_size);
   }
-  //else if (block_size <= MI_LARGE_MAX_OBJ_SIZE) {
-  //  page = mi_arenas_page_regular_alloc(heap, mi_slice_count_of_size(MI_LARGE_PAGE_SIZE), block_size);
-  // }
+  else if (block_size <= MI_LARGE_MAX_OBJ_SIZE) {
+    page = mi_arenas_page_regular_alloc(heap, mi_slice_count_of_size(MI_LARGE_PAGE_SIZE), block_size);
+  }
   else {
     page = mi_arenas_page_singleton_alloc(heap, block_size, block_alignment);
   }