diff --git a/NEWS b/NEWS
index f100a9478e4..a706d4379a3 100644
--- a/NEWS
+++ b/NEWS
@@ -14,6 +14,8 @@ PHP                                                                        NEWS
   (Keisial at gmail dot com, Greg)
 - Added support for using compressed connections with PDO_mysql. (Johannes)
 
+- Deprecated define_syslog_variables(). (Kalle)
+
 - Fixed bug causing the algorithm parameter of mhash() to be modified. (Scott)
 
 - Fixed bug #46238 (Segmentation fault on static call with empty string method).
diff --git a/ext/standard/syslog.c b/ext/standard/syslog.c
index 392f671ac22..91f66dc86d4 100644
--- a/ext/standard/syslog.c
+++ b/ext/standard/syslog.c
@@ -207,6 +207,8 @@ PHP_FUNCTION(define_syslog_variables)
 		return;
 	}
 
+	php_error_docref(NULL TSRMLS_CC, E_DEPRECATED, "define_syslog_variables is deprecated, please use the syslog constants instead");
+
 	if (!BG(syslog_started)) {
 		start_syslog(TSRMLS_C);
 	}
diff --git a/win32/build/registersyslog.php b/win32/build/registersyslog.php
index db5f459f735..e5aa1d92c00 100755
--- a/win32/build/registersyslog.php
+++ b/win32/build/registersyslog.php
@@ -20,7 +20,6 @@ if (extension_loaded("win32std")) {
 		reg_set_value($key, "TypesSupported", REG_DWORD, 7) or die("Types");
 		reg_set_value($key, "EventMessageFile", REG_SZ, $dll) or die("EventMessageFile");
 
-		define_syslog_variables();
 		syslog(LOG_NOTICE, "Registered PHP Event source");
 	} else {
 		echo "Could not register event source\n";