diff --git a/php_systemd.h b/php_systemd.h
index 2e2f2e6..14c1f72 100644
--- a/php_systemd.h
+++ b/php_systemd.h
@@ -8,4 +8,8 @@ PHP_FUNCTION(sd_journal_send);
 extern zend_module_entry systemd_module_entry;
 #define phpext_systemd_ptr &systemd_module_entry
 
+#ifndef SD_JOURNAL_SUPPRESS_LOCATION
+#define SD_JOURNAL_SUPPRESS_LOCATION 1
+#endif
+
 #endif
diff --git a/systemd.c b/systemd.c
index 1eaf98b..a8b7ea4 100644
--- a/systemd.c
+++ b/systemd.c
@@ -5,8 +5,13 @@
 #include "php_systemd.h"
 #include <systemd/sd-journal.h>
 
+ZEND_BEGIN_ARG_INFO_EX(arginfo_sd_journal_send, 0, 0, 3)
+ZEND_ARG_TYPE_INFO(0, tags, IS_STRING, 0)
+ZEND_ARG_VARIADIC_INFO(0, 3)
+ZEND_END_ARG_INFO()
+
 zend_function_entry systemd_functions[] = {
-    PHP_FE(sd_journal_send, NULL)
+    PHP_FE(sd_journal_send, arginfo_sd_journal_send)
     {NULL, NULL, NULL} // Sentinel
 };