diff --git a/NEWS b/NEWS
index fba0c6bbfd6..42d38f3f405 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,8 @@ PHP                                                                        NEWS
 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 ?? ??? ????, PHP 7.4.0beta1
 
+- Core:
+  . Fixed bug #78212 (Segfault in built-in webserver). (cmb)
 
 11 Jul 2019, PHP 7.4.0alpha3
 
diff --git a/win32/wsyslog.c b/win32/wsyslog.c
index 50a34fabf0f..b4e58b15629 100644
--- a/win32/wsyslog.c
+++ b/win32/wsyslog.c
@@ -95,6 +95,10 @@ void vsyslog(int priority, const char *message, va_list args)
 	DWORD evid;
 	wchar_t *strsw[2];
 
+	/* default event source */
+	if (INVALID_HANDLE_VALUE == PW32G(log_source))
+		openlog("php", LOG_PID, LOG_SYSLOG);
+
 	switch (priority) {			/* translate UNIX type into NT type */
 		case LOG_ALERT:
 			etype = EVENTLOG_ERROR_TYPE;