diff --git a/configure.ac b/configure.ac
index 409756cb8d98a03bd8d2fbad66c5a4757dc91814..6f13b30de0fe01e5b01a726a339e353560bbf6f2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -212,7 +212,7 @@ AC_SUBST([GNUCOMPAT_INCLUDE_PATH])
 
 # Checks for header files.
 AC_HEADER_STDC
-AC_CHECK_HEADERS([malloc.h unistd.h X11/Xlib.h X11/Xutil.h],,
+AC_CHECK_HEADERS([unistd.h X11/Xlib.h X11/Xutil.h],,
 		 [AC_MSG_ERROR([Exiting...])])
 AC_CHECK_HEADERS([rpc/xdr.h],,[AC_MSG_ERROR([Exiting...])])