diff --git a/doc/container.qbk b/doc/container.qbk
index 5060c4c..9e66954 100644
--- a/doc/container.qbk
+++ b/doc/container.qbk
@@ -1252,6 +1252,7 @@ use [*Boost.Container]? There are several reasons for that:
 * Fixed serious bug in heterogeneous lookup functions (is_transparent was broken).
 
 * Fixed bugs:
+   * [@https://github.com/boostorg/container/issues/77 GitHub #77: ['"warning: 'sbrk' is deprecated"]].
    * [@https://github.com/boostorg/container/issues/79 GitHub #79: ['"Mark small_vector move operations noexcept"]].
    * [@https://github.com/boostorg/container/issues/82 GitHub #82: ['"Function definition in header file"]].
    * [@https://github.com/boostorg/container/issues/83 GitHub #83: ['"Iterator zero incrementing leads to assert on empty vector"]].
diff --git a/src/dlmalloc_ext_2_8_6.c b/src/dlmalloc_ext_2_8_6.c
index d0e01f8..918ce02 100644
--- a/src/dlmalloc_ext_2_8_6.c
+++ b/src/dlmalloc_ext_2_8_6.c
@@ -19,6 +19,8 @@
 #define MSPACES      1
 #define NO_MALLINFO  1
 #define NO_MALLOC_STATS 1
+//disable sbrk as it's deprecated in some systems and weakens ASLR
+#define HAVE_MORECORE 0
 
 
 #if !defined(NDEBUG)