diff --git a/ext/standard/basic_functions.c b/ext/standard/basic_functions.c
index d61cca8c5a4..45f7c8bcbca 100644
--- a/ext/standard/basic_functions.c
+++ b/ext/standard/basic_functions.c
@@ -3054,11 +3054,13 @@ ZEND_END_ARG_INFO()
 
 #if MEMORY_LIMIT
 static
-ZEND_BEGIN_ARG_INFO(arginfo_memory_get_usage, 0)
+ZEND_BEGIN_ARG_INFO_EX(arginfo_memory_get_usage, 0, 0, 0)
+	ZEND_ARG_INFO(0, real_usage)
 ZEND_END_ARG_INFO()
 
 static
-ZEND_BEGIN_ARG_INFO(arginfo_memory_get_peak_usage, 0)
+ZEND_BEGIN_ARG_INFO_EX(arginfo_memory_get_peak_usage, 0, 0, 0)
+	ZEND_ARG_INFO(0, real_usage)
 ZEND_END_ARG_INFO()
 #endif
 /* }}} */
diff --git a/ext/standard/var.c b/ext/standard/var.c
index bfc61a0ea49..1292d6b5364 100644
--- a/ext/standard/var.c
+++ b/ext/standard/var.c
@@ -909,7 +909,7 @@ PHP_FUNCTION(unserialize)
 /* }}} */
 
 #if MEMORY_LIMIT
-/* {{{ proto int memory_get_usage()
+/* {{{ proto int memory_get_usage([real_usage])
     Returns the allocated by PHP memory */
 PHP_FUNCTION(memory_get_usage) {
 	zend_bool real_usage = 0;
@@ -921,7 +921,7 @@ PHP_FUNCTION(memory_get_usage) {
 	RETURN_LONG(zend_memory_usage(real_usage TSRMLS_CC));
 }
 /* }}} */
-/* {{{ proto int memory_get_peak_usage()
+/* {{{ proto int memory_get_peak_usage([real_usage])
     Returns the peak allocated by PHP memory */
 PHP_FUNCTION(memory_get_peak_usage) {
 	zend_bool real_usage = 0;