diff --git a/m4/ec_attribute.m4 b/m4/ec_attribute.m4
index 74d59768..83379fcb 100644
--- a/m4/ec_attribute.m4
+++ b/m4/ec_attribute.m4
@@ -20,7 +20,6 @@ AC_DEFUN([EC_C___ATTRIBUTE__],
       AC_LANG_PROGRAM(
       [[
 #include <stdlib.h>
-      ]], [[
 int foo(int x __attribute__ ((unused))) { exit(1); }
       ]])
     ],