diff --git a/ares/configure.ac b/ares/configure.ac
index abb65d940f66fc8e4de32d5f39b85ce8a54f735d..f4c235f807757a2bd9fd04dcaeceabdea6ca5fbd 100644
--- a/ares/configure.ac
+++ b/ares/configure.ac
@@ -30,6 +30,9 @@ AC_HELP_STRING([--disable-debug],[Disable debug options]),
        ;;
   *)   AC_MSG_RESULT(yes)
 
+    dnl Checks for standard header files, to make memdebug.h inclusions bettter
+    AC_HEADER_STDC
+
     CPPFLAGS="$CPPFLAGS -DCURLDEBUG -I../include"
     CFLAGS="$CFLAGS -g" 
     if test "$GCC" = "yes"; then