diff --git a/configure.ac b/configure.ac
index 6267e2e..fcc1c8b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,12 +30,11 @@ AC_ARG_ENABLE(x11,
 
 AC_CHECK_HEADERS(inttypes.h endian.h)
 AC_CHECK_FUNCS(vsnprintf getenv putenv strcasecmp usleep gettimeofday)
-case "${target_os}" in
-  *mingw32*|*cygwin*)
-    AC_CHECK_LIB(kernel32, Sleep,
-                 [AC_DEFINE(HAVE_KERNEL32_SLEEP, 1, [Define if you have Windows' Sleep])])
-    ;;
-esac
+AC_MSG_CHECKING(for Sleep)
+AC_TRY_COMPILE([#include <windows.h>],[Sleep(42);],
+ [AC_MSG_RESULT(yes)
+  AC_DEFINE(HAVE_SLEEP, 1, [Define if you have Windows' Sleep])],
+ [AC_MSG_RESULT(no)])
 AC_CHECK_LIB(m, sin, MATH_LIBS="${MATH_LIBS} -lm")
 
 CACA_DRIVERS="" 
diff --git a/src/time.c b/src/time.c
index 9208d69..071234d 100644
--- a/src/time.c
+++ b/src/time.c
@@ -46,7 +46,7 @@ void _caca_sleep(unsigned int usec)
 {
 #if defined(HAVE_USLEEP)
         usleep(usec);
-#elif defined(HAVE_KERNEL32_SLEEP)
+#elif defined(HAVE_SLEEP)
         Sleep(usec / 1000);
 #else
         SLEEP