diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
new file mode 100644
index 0b1c912..e7d4b85
*** a/src/backend/utils/misc/guc.c
--- b/src/backend/utils/misc/guc.c
*************** static int	syslog_facility = 0;
*** 177,182 ****
--- 177,183 ----
  static void assign_syslog_facility(int newval, void *extra);
  static void assign_syslog_ident(const char *newval, void *extra);
  static void assign_session_replication_role(int newval, void *extra);
+ static bool check_event_source(char **newval, void **extra, GucSource source);
  static bool check_temp_buffers(int *newval, void **extra, GucSource source);
  static bool check_phony_autocommit(bool *newval, void **extra, GucSource source);
  static bool check_debug_assertions(bool *newval, void **extra, GucSource source);
*************** static struct config_string ConfigureNam
*** 2820,2826 ****
  		NULL, assign_syslog_ident, NULL
  	},
  
- #ifdef WIN32
  	{
  		{"event_source", PGC_POSTMASTER, LOGGING_WHERE,
  			gettext_noop("Sets the application name used to identify"
--- 2821,2826 ----
*************** static struct config_string ConfigureNam
*** 2829,2837 ****
  		},
  		&event_source,
  		"PostgreSQL",
! 		NULL, NULL, NULL
  	},
- #endif
  
  	{
  		{"TimeZone", PGC_USERSET, CLIENT_CONN_LOCALE,
--- 2829,2836 ----
  		},
  		&event_source,
  		"PostgreSQL",
! 		check_event_source, NULL, NULL
  	},
  
  	{
  		{"TimeZone", PGC_USERSET, CLIENT_CONN_LOCALE,
*************** assign_syslog_ident(const char *newval,
*** 8301,8306 ****
--- 8300,8315 ----
  	/* Without syslog support, it will always be set to "none", so ignore */
  }
  
+ static bool
+ check_event_source(char **newval, void **extra, GucSource source)
+ {
+ #ifndef WIN32
+ 	GUC_check_errmsg("event_source can only be setted in windows builds");
+ 	return false;
+ #endif
+ 
+ 	return true;
+ }
  
  static void
  assign_session_replication_role(int newval, void *extra)