--- libev/libev.m4	2010/01/13 12:44:33	1.12
+++ libev/libev.m4	2010/03/16 00:43:22	1.13
@@ -11,7 +11,8 @@
    if test $(uname) = Linux; then
       AC_MSG_CHECKING(for clock_gettime syscall)
       AC_LINK_IFELSE([AC_LANG_PROGRAM(
-                      [#include <syscall.h>
+                      [#include <unistd.h>
+                       #include <sys/syscall.h>
                        #include <time.h>],
                       [struct timespec ts; int status = syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts)])],
                      [ac_have_clock_syscall=1