diff --git a/ObsoleteFiles.inc b/ObsoleteFiles.inc
index 96bfbb651cb2..f8021065361f 100644
--- a/ObsoleteFiles.inc
+++ b/ObsoleteFiles.inc
@@ -38,6 +38,12 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 20150818: *allocm() are gone in jemalloc 4.0.0
+OLD_FILES+=usr/share/man/man3/allocm.3.gz
+OLD_FILES+=usr/share/man/man3/dallocm.3.gz
+OLD_FILES+=usr/share/man/man3/nallocm.3.gz
+OLD_FILES+=usr/share/man/man3/rallocm.3.gz
+OLD_FILES+=usr/share/man/man3/sallocm.3.gz
 # 20150802: Remove netbsd's test on pw(8)
 OLD_FILES+=usr/tests/usr.sbin/pw/pw_test
 # 20150719: Remove libarchive.pc
diff --git a/contrib/jemalloc/FREEBSD-diffs b/contrib/jemalloc/FREEBSD-diffs
index 58f5f6fc08a0..7d6955d773b2 100644
--- a/contrib/jemalloc/FREEBSD-diffs
+++ b/contrib/jemalloc/FREEBSD-diffs
@@ -1,8 +1,8 @@
 diff --git a/doc/jemalloc.xml.in b/doc/jemalloc.xml.in
-index 8fc774b..47b453c 100644
+index 8fc774b..fdbef95 100644
 --- a/doc/jemalloc.xml.in
 +++ b/doc/jemalloc.xml.in
-@@ -53,6 +53,17 @@
+@@ -53,11 +53,23 @@
      <para>This manual describes jemalloc @jemalloc_version@.  More information
      can be found at the <ulink
      url="http://www.canonware.com/jemalloc/">jemalloc website</ulink>.</para>
@@ -20,7 +20,14 @@ index 8fc774b..47b453c 100644
    </refsect1>
    <refsynopsisdiv>
      <title>SYNOPSIS</title>
-@@ -2759,4 +2770,18 @@ malloc_conf = "lg_chunk:24";]]></programlisting></para>
+     <funcsynopsis>
+-      <funcsynopsisinfo>#include &lt;<filename class="headerfile">jemalloc/jemalloc.h</filename>&gt;</funcsynopsisinfo>
++      <funcsynopsisinfo>#include &lt;<filename class="headerfile">stdlib.h</filename>&gt;
++#include &lt;<filename class="headerfile">malloc_np.h</filename>&gt;</funcsynopsisinfo>
+       <refsect2>
+         <title>Standard API</title>
+         <funcprototype>
+@@ -2759,4 +2771,18 @@ malloc_conf = "lg_chunk:24";]]></programlisting></para>
      <para>The <function>posix_memalign<parameter/></function> function conforms
      to IEEE Std 1003.1-2001 (&ldquo;POSIX.1&rdquo;).</para>
    </refsect1>
diff --git a/contrib/jemalloc/FREEBSD-upgrade b/contrib/jemalloc/FREEBSD-upgrade
index 370719e7c0e7..6ee6cc91e42e 100755
--- a/contrib/jemalloc/FREEBSD-upgrade
+++ b/contrib/jemalloc/FREEBSD-upgrade
@@ -72,9 +72,9 @@ do_extract() {
     patch -p1 < "${src}/FREEBSD-diffs"
     find . -name '*.orig' -delete
     # Generate various files.
-    ./autogen.sh --enable-cc-silence --enable-dss --enable-xmalloc \
-      --enable-utrace --with-xslroot=/usr/local/share/xsl/docbook \
-      --with-private-namespace=__ --with-lg-page-sizes=12,13,14,16
+    ./autogen.sh --enable-cc-silence --enable-xmalloc --enable-utrace \
+      --with-xslroot=/usr/local/share/xsl/docbook --with-private-namespace=__ \
+      --with-lg-page-sizes=12,13,14,16
     gmake dist
   )
 }
diff --git a/contrib/jemalloc/doc/jemalloc.3 b/contrib/jemalloc/doc/jemalloc.3
index 9778e5093fa2..2afb8628c65a 100644
--- a/contrib/jemalloc/doc/jemalloc.3
+++ b/contrib/jemalloc/doc/jemalloc.3
@@ -2,12 +2,12 @@
 .\"     Title: JEMALLOC
 .\"    Author: Jason Evans
 .\" Generator: DocBook XSL Stylesheets v1.76.1 <http://docbook.sf.net/>
-.\"      Date: 08/17/2015
+.\"      Date: 08/18/2015
 .\"    Manual: User Manual
 .\"    Source: jemalloc 4.0.0-0-g6e98caf8f064482b9ab292ef3638dea67420bbc2
 .\"  Language: English
 .\"
-.TH "JEMALLOC" "3" "08/17/2015" "jemalloc 4.0.0-0-g6e98caf8f064" "User Manual"
+.TH "JEMALLOC" "3" "08/18/2015" "jemalloc 4.0.0-0-g6e98caf8f064" "User Manual"
 .\" -----------------------------------------------------------------
 .\" * Define some portability stuff
 .\" -----------------------------------------------------------------
@@ -51,7 +51,8 @@ make variable)\&.
 .sp
 .ft B
 .nf
-#include <jemalloc/jemalloc\&.h>
+#include <stdlib\&.h>
+#include <malloc_np\&.h>
 .fi
 .ft
 .SS "Standard API"
diff --git a/include/malloc_np.h b/include/malloc_np.h
index 5f9d8134791f..d3feb356b26d 100644
--- a/include/malloc_np.h
+++ b/include/malloc_np.h
@@ -36,13 +36,14 @@
 #include <strings.h>
 
 __BEGIN_DECLS
-typedef void *(chunk_alloc_t)(void *, size_t, size_t, bool *, bool *, unsigned);
-typedef bool (chunk_dalloc_t)(void *, size_t, bool, unsigned);
-typedef bool (chunk_commit_t)(void *, size_t, size_t, size_t, unsigned);
-typedef bool (chunk_decommit_t)(void *, size_t, size_t, size_t, unsigned);
-typedef bool (chunk_purge_t)(void *, size_t, size_t, size_t, unsigned);
-typedef bool (chunk_split_t)(void *, size_t, size_t, size_t, bool, unsigned);
-typedef bool (chunk_merge_t)(void *, size_t, void *, size_t, bool, unsigned);
+typedef void *(chunk_alloc_t)(void *, size_t, size_t, _Bool *, _Bool *,
+    unsigned);
+typedef _Bool (chunk_dalloc_t)(void *, size_t, _Bool, unsigned);
+typedef _Bool (chunk_commit_t)(void *, size_t, size_t, size_t, unsigned);
+typedef _Bool (chunk_decommit_t)(void *, size_t, size_t, size_t, unsigned);
+typedef _Bool (chunk_purge_t)(void *, size_t, size_t, size_t, unsigned);
+typedef _Bool (chunk_split_t)(void *, size_t, size_t, size_t, _Bool, unsigned);
+typedef _Bool (chunk_merge_t)(void *, size_t, void *, size_t, _Bool, unsigned);
 typedef struct {
 	chunk_alloc_t		*alloc;
 	chunk_dalloc_t		*dalloc;