diff --git a/acinclude.m4 b/acinclude.m4
index cd204477f00cd5573cf6f9b338604fc825320196..99cd331a3c2ae18f46deb0ccab74ff808259070e 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -171,6 +171,57 @@ AC_DEFUN([CURL_CHECK_HEADER_WS2TCPIP], [
 ])
 
 
+dnl CURL_CHECK_HEADER_MALLOC
+dnl -------------------------------------------------
+dnl Check for compilable and valid malloc.h header,
+dnl and check if it is needed even with stdlib.h
+
+AC_DEFUN([CURL_CHECK_HEADER_MALLOC], [
+  AC_CACHE_CHECK([for malloc.h], [ac_cv_header_malloc_h], [
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM([
+#include <malloc.h>
+      ],[
+        void *p = malloc(10);
+        void *q = calloc(10,10);
+        free(p);
+        free(q);
+      ])
+    ],[
+      ac_cv_header_malloc_h="yes"
+    ],[
+      ac_cv_header_malloc_h="no"
+    ])
+  ])
+  if test "$ac_cv_header_malloc_h" = "yes"; then
+    AC_DEFINE_UNQUOTED(HAVE_MALLOC_H, 1,
+      [Define to 1 if you have the malloc.h header file.])
+    #
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM([
+#include <stdlib.h>
+      ],[
+        void *p = malloc(10);
+        void *q = calloc(10,10);
+        free(p);
+        free(q);
+      ])
+    ],[
+      curl_cv_need_header_malloc_h="no"
+    ],[
+      curl_cv_need_header_malloc_h="yes"
+    ])
+    #
+    case "$curl_cv_need_header_malloc_h" in
+      yes)
+        AC_DEFINE_UNQUOTED(NEED_MALLOC_H, 1,
+          [Define to 1 if you need the malloc.h header file.])
+        ;;
+    esac
+  fi
+])
+
+
 dnl CURL_CHECK_TYPE_SOCKLEN_T
 dnl -------------------------------------------------
 dnl Check for existing socklen_t type, and provide
diff --git a/ares/acinclude.m4 b/ares/acinclude.m4
index 05739f1145c2f48552f1810434e05310202bab86..4db7a360dab4c64cba34230aec6f1255d6ecd613 100644
--- a/ares/acinclude.m4
+++ b/ares/acinclude.m4
@@ -149,6 +149,57 @@ AC_DEFUN([CURL_CHECK_HEADER_WS2TCPIP], [
 ])
 
 
+dnl CURL_CHECK_HEADER_MALLOC
+dnl -------------------------------------------------
+dnl Check for compilable and valid malloc.h header,
+dnl and check if it is needed even with stdlib.h
+
+AC_DEFUN([CURL_CHECK_HEADER_MALLOC], [
+  AC_CACHE_CHECK([for malloc.h], [ac_cv_header_malloc_h], [
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM([
+#include <malloc.h>
+      ],[
+        void *p = malloc(10);
+        void *q = calloc(10,10);
+        free(p);
+        free(q);
+      ])
+    ],[
+      ac_cv_header_malloc_h="yes"
+    ],[
+      ac_cv_header_malloc_h="no"
+    ])
+  ])
+  if test "$ac_cv_header_malloc_h" = "yes"; then
+    AC_DEFINE_UNQUOTED(HAVE_MALLOC_H, 1,
+      [Define to 1 if you have the malloc.h header file.])
+    #
+    AC_COMPILE_IFELSE([
+      AC_LANG_PROGRAM([
+#include <stdlib.h>
+      ],[
+        void *p = malloc(10);
+        void *q = calloc(10,10);
+        free(p);
+        free(q);
+      ])
+    ],[
+      curl_cv_need_header_malloc_h="no"
+    ],[
+      curl_cv_need_header_malloc_h="yes"
+    ])
+    #
+    case "$curl_cv_need_header_malloc_h" in
+      yes)
+        AC_DEFINE_UNQUOTED(NEED_MALLOC_H, 1,
+          [Define to 1 if you need the malloc.h header file.])
+        ;;
+    esac
+  fi
+])
+
+
 dnl CURL_CHECK_TYPE_SOCKLEN_T
 dnl -------------------------------------------------
 dnl Check for existing socklen_t type, and provide
diff --git a/ares/configure.ac b/ares/configure.ac
index a59e701c5435c51c688673c7cb3cfbde0656778b..b331c33616688a3371d9b44a7e124d5382fe65f8 100644
--- a/ares/configure.ac
+++ b/ares/configure.ac
@@ -96,6 +96,8 @@ CURL_CHECK_HEADER_WINSOCK
 CURL_CHECK_HEADER_WINSOCK2
 CURL_CHECK_HEADER_WS2TCPIP
 
+CURL_CHECK_HEADER_MALLOC
+
 dnl check for a few basic system headers we need
 AC_CHECK_HEADERS(
        sys/types.h \
diff --git a/configure.ac b/configure.ac
index 7ce7b3d5f85186977c623001cd6d2170b50c8202..c5486a387b9a58a24e0a1ee2d9a41a2b546a2c81 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1443,6 +1443,7 @@ dnl **********************************************************************
 dnl Checks for header files.
 AC_HEADER_STDC
 
+CURL_CHECK_HEADER_MALLOC
 
 dnl Now check for the very most basic headers. Then we can use these
 dnl ones as default-headers when checking for the rest!
@@ -1454,7 +1455,6 @@ AC_CHECK_HEADERS(
         sys/ioctl.h \
         assert.h \
         unistd.h \
-        malloc.h \
         stdlib.h \
         limits.h \
         arpa/inet.h \