diff --git a/ext/date/php_date.c b/ext/date/php_date.c
index d24ae126ea2..95a5e5ae736 100644
--- a/ext/date/php_date.c
+++ b/ext/date/php_date.c
@@ -2308,7 +2308,7 @@ static void add_common_properties(HashTable *myht, zend_object *zobj)
 
 	common = zend_std_get_properties(zobj);
 
-	ZEND_HASH_MAP_FOREACH_STR_KEY_VAL_IND(common, name, prop) {
+	ZEND_HASH_FOREACH_STR_KEY_VAL_IND(common, name, prop) {
 		if (zend_hash_add(myht, name, prop) != NULL) {
 			Z_TRY_ADDREF_P(prop);
 		}
@@ -2965,7 +2965,7 @@ static void restore_custom_datetime_properties(zval *object, HashTable *myht)
 	zend_string      *prop_name;
 	zval             *prop_val;
 
-	ZEND_HASH_MAP_FOREACH_STR_KEY_VAL(myht, prop_name, prop_val) {
+	ZEND_HASH_FOREACH_STR_KEY_VAL(myht, prop_name, prop_val) {
 		if (!prop_name || (Z_TYPE_P(prop_val) == IS_REFERENCE) || date_time_is_internal_property(prop_name)) {
 			continue;
 		}
@@ -4166,7 +4166,7 @@ static void restore_custom_datetimezone_properties(zval *object, HashTable *myht
 	zend_string      *prop_name;
 	zval             *prop_val;
 
-	ZEND_HASH_MAP_FOREACH_STR_KEY_VAL(myht, prop_name, prop_val) {
+	ZEND_HASH_FOREACH_STR_KEY_VAL(myht, prop_name, prop_val) {
 		if (!prop_name || (Z_TYPE_P(prop_val) == IS_REFERENCE) || date_timezone_is_internal_property(prop_name)) {
 			continue;
 		}
@@ -4801,7 +4801,7 @@ static void restore_custom_dateinterval_properties(zval *object, HashTable *myht
 	zend_string      *prop_name;
 	zval             *prop_val;
 
-	ZEND_HASH_MAP_FOREACH_STR_KEY_VAL(myht, prop_name, prop_val) {
+	ZEND_HASH_FOREACH_STR_KEY_VAL(myht, prop_name, prop_val) {
 		if (!prop_name || (Z_TYPE_P(prop_val) == IS_REFERENCE) || date_interval_is_internal_property(prop_name)) {
 			continue;
 		}
@@ -5878,7 +5878,7 @@ static void restore_custom_dateperiod_properties(zval *object, HashTable *myht)
 	zend_string      *prop_name;
 	zval             *prop_val;
 
-	ZEND_HASH_MAP_FOREACH_STR_KEY_VAL(myht, prop_name, prop_val) {
+	ZEND_HASH_FOREACH_STR_KEY_VAL(myht, prop_name, prop_val) {
 		if (!prop_name || (Z_TYPE_P(prop_val) == IS_REFERENCE) || date_period_is_internal_property(prop_name)) {
 			continue;
 		}
diff --git a/ext/date/tests/bug-gh16037.phpt b/ext/date/tests/bug-gh16037.phpt
new file mode 100644
index 00000000000..834bc653c2f
--- /dev/null
+++ b/ext/date/tests/bug-gh16037.phpt
@@ -0,0 +1,9 @@
+--TEST--
+Test for bug GH-16037: Assertion failure in ext/date/php_date.c
+--FILE--
+<?php
+$di = (new DateInterval('P1Y'))->__unserialize([[]]);
+echo gettype($di);
+?>
+--EXPECT--
+NULL