diff --git a/.travis.yml b/.travis.yml
index 6cee8a3..ed1f70c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,6 +7,7 @@ php:
   - 7.1
   - 7.2
   - 7.3
+  - 7.4
 
 script:
   - phpize
diff --git a/src/collections_me.c b/src/collections_me.c
index de65a88..0e06003 100644
--- a/src/collections_me.c
+++ b/src/collections_me.c
@@ -6,12 +6,6 @@
 
 #include "php_collections_me.h"
 
-// ZEND_ACC_CTOR is removed in PHP 7.4
-// Removing the flag does not affect the constructor from being recognized.
-#if PHP_VERSION_ID >= 70400
-#define ZEND_ACC_CTOR            0
-#endif
-
 ZEND_BEGIN_ARG_INFO(action_arginfo, 0)
     ZEND_ARG_CALLABLE_INFO(0, action, 0)
 ZEND_END_ARG_INFO()
diff --git a/src/collections_methods.c b/src/collections_methods.c
index 952fb1e..59d2ccd 100644
--- a/src/collections_methods.c
+++ b/src/collections_methods.c
@@ -691,9 +691,12 @@ void collection_write_dimension(zval* object, zval* offset, zval* value)
     Z_TRY_ADDREF_P(value);
 }
 
-void collection_write_property(zval* object, zval* member, zval* value, void** unused)
+zobj_write_prop_ret_t collection_write_property(zval* object, zval* member, zval* value, void** unused)
 {
     collection_write_dimension(object, member, value);
+#if PHP_VERSION_ID > 70400
+    return value;
+#endif
 }
 
 zval* collection_read_dimension(zval* object, zval* offset, int type, zval* rv)
diff --git a/src/php_collections.h b/src/php_collections.h
index 488e4c9..bec5389 100644
--- a/src/php_collections.h
+++ b/src/php_collections.h
@@ -30,6 +30,12 @@ extern zend_module_entry collections_module_entry;
 #error "This extension requires PHP 7.1 and above."
 #endif
 
+#if PHP_VERSION_ID >= 70400
+typedef zval* zobj_write_prop_ret_t;
+#else
+typedef void zobj_write_prop_ret_t;
+#endif
+
 #define PHP_COLLECTIONS_COMPARE_NATURAL (1 << 0)
 #define PHP_COLLECTIONS_FOLD_CASE       (1 << 1)
 
@@ -62,7 +68,7 @@ void collection_write_dimension(zval* object, zval* offset, zval* value);
 zval* collection_read_dimension(zval* object, zval* offset, int type, zval* rv);
 void collection_unset_dimension(zval* object, zval* offset);
 int collection_has_property(zval* object, zval* member, int has_set_exists, void**);
-void collection_write_property(zval* object, zval* member, zval* value, void**);
+zobj_write_prop_ret_t collection_write_property(zval* object, zval* member, zval* value, void**);
 zval* collection_read_property(zval* object, zval* member, int type, void**, zval* rv);
 void collection_unset_property(zval* object, zval* member, void**);