diff --git a/UPGRADING.INTERNALS b/UPGRADING.INTERNALS
index 67c779ea637c..ff5c2f5c84c2 100644
--- a/UPGRADING.INTERNALS
+++ b/UPGRADING.INTERNALS
@@ -45,6 +45,13 @@ PHP 8.5 INTERNALS UPGRADE NOTES
     properties.
   . ZEND_IS_XDIGIT() macro was removed because it was unused and its name
     did not match its actual behavior.
+  . The following zend_string-related legacy aliases were removed:
+    * IS_INTERNED() - use ZSTR_IS_INTERNED()
+    * STR_EMPTY_ALLOC() - use ZSTR_EMPTY_ALLOC()
+    * _STR_HEADER_SIZE - use _ZSTR_HEADER_SIZE
+    * STR_ALLOCA_ALLOC() - use ZSTR_ALLOCA_ALLOC()
+    * STR_ALLOCA_INIT() - use ZSTR_ALLOCA_INIT()
+    * STR_ALLOCA_FREE() - use ZSTR_ALLOCA_FREE()
   . zend_register_constant() now returns a pointer to the added constant
     on success and NULL on failure instead of SUCCESS/FAILURE.
 
diff --git a/Zend/zend_string.h b/Zend/zend_string.h
index f60e4dec4e71..ac9a7465c876 100644
--- a/Zend/zend_string.h
+++ b/Zend/zend_string.h
@@ -70,15 +70,6 @@ END_EXTERN_C()
 #define ZSTR_H(zstr)    (zstr)->h
 #define ZSTR_HASH(zstr) zend_string_hash_val(zstr)
 
-/* Compatibility macros */
-
-#define IS_INTERNED(s)	ZSTR_IS_INTERNED(s)
-#define STR_EMPTY_ALLOC()	ZSTR_EMPTY_ALLOC()
-#define _STR_HEADER_SIZE _ZSTR_HEADER_SIZE
-#define STR_ALLOCA_ALLOC(str, _len, use_heap) ZSTR_ALLOCA_ALLOC(str, _len, use_heap)
-#define STR_ALLOCA_INIT(str, s, len, use_heap) ZSTR_ALLOCA_INIT(str, s, len, use_heap)
-#define STR_ALLOCA_FREE(str, use_heap) ZSTR_ALLOCA_FREE(str, use_heap)
-
 /*---*/
 
 #define ZSTR_IS_INTERNED(s)					(GC_FLAGS(s) & IS_STR_INTERNED)