diff --git a/configure.ac b/configure.ac
index 11de388..90f0e48 100644
--- a/configure.ac
+++ b/configure.ac
@@ -137,7 +137,7 @@ AC_DEFUN([TOCK_CHECK_CFLAGS],[
   AC_LANG_PUSH(C)
   old_CFLAGS="$CFLAGS"
   CFLAGS="$CFLAGS $1"
-  AC_COMPILE_IFELSE(AC_LANG_PROGRAM([[ ]]),[
+  AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],[
     AC_MSG_RESULT([yes])
     $2
   ],[