diff --git a/m4/curl-compilers.m4 b/m4/curl-compilers.m4
index 1ea4d17ebfbb7a8daff81cc5c0679d9b1ce50f6a..413293b1065a6ef786539e79b9d49b1086354d9a 100644
--- a/m4/curl-compilers.m4
+++ b/m4/curl-compilers.m4
@@ -21,7 +21,7 @@
 #***************************************************************************
 
 # File version for 'aclocal' use. Keep it a single number.
-# serial 55
+# serial 56
 
 
 dnl CURL_CHECK_COMPILER
diff --git a/m4/curl-confopts.m4 b/m4/curl-confopts.m4
index bb25bb925c5c5db6b6a3d8c373929416bfafb1f6..30fb025fdf75e575751c6ece62c17414c483e219 100644
--- a/m4/curl-confopts.m4
+++ b/m4/curl-confopts.m4
@@ -21,7 +21,7 @@
 #***************************************************************************
 
 # File version for 'aclocal' use. Keep it a single number.
-# serial 13
+# serial 14
 
 dnl CURL_CHECK_OPTION_THREADED_RESOLVER
 dnl -------------------------------------------------
diff --git a/m4/curl-functions.m4 b/m4/curl-functions.m4
index 1bbd330ae568173161fe2b856d513caad31d349c..ca5b86fc37d428a27087cfa1308835abfd926794 100644
--- a/m4/curl-functions.m4
+++ b/m4/curl-functions.m4
@@ -21,7 +21,7 @@
 #***************************************************************************
 
 # File version for 'aclocal' use. Keep it a single number.
-# serial 64
+# serial 65
 
 
 dnl CURL_INCLUDES_ARPA_INET
@@ -5970,7 +5970,7 @@ AC_DEFUN([CURL_CHECK_FUNC_SETXATTR], [
       AC_LANG_PROGRAM([[
         $curl_includes_sys_xattr
       ]],[[
-        if(0 != setxattr("", "", "", 0, 0))
+        if(0 != setxattr(0, 0, 0, 0, 0))
           return 1;
       ]])
     ],[