diff -Naur a/build/gen_stub.php b/build/gen_stub.php
--- a/build/gen_stub.php	2026-10-19 19:02:46.000000000 +0200
+++ b/build/gen_stub.php	2026-10-21 15:48:33.790102242 +0200
@@ -3051,6 +3051,7 @@
         "username" => "ZEND_STR_USERNAME",
         "password" => "ZEND_STR_PASSWORD",
         "clone" => "ZEND_STR_CLONE",
+        "memory_limit" => "ZEND_STR_MEMORY_LIMIT",
         '8.0' => 'ZEND_STR_8_DOT_0',
         '8.1' => 'ZEND_STR_8_DOT_1',
         '8.2' => 'ZEND_STR_8_DOT_2',
diff -Naur a/main/main.c b/main/main.c
--- a/main/main.c	2026-10-21 15:46:21.154304938 +0200
+++ b/main/main.c	2026-10-21 15:51:43.307014361 +0200
@@ -378,12 +378,18 @@
 	}
 
 	if (zend_set_memory_limit(value) == FAILURE) {
-		zend_error(E_ERROR, "Failed to set memory limit to %zd bytes (Current memory usage is %zd bytes)", value, zend_memory_usage(true));
-		return FAILURE;
+		if (stage != ZEND_INI_STAGE_DEACTIVATE) {
+			zend_error(E_ERROR, "Failed to set memory limit to %zd bytes (Current memory usage is %zd bytes)", value, zend_memory_usage(true));
+			return FAILURE;
+		}
 	}
 
-	PG(memory_limit) = value;
 	PG(max_memory_limit) = value;
+	if (stage == ZEND_INI_STAGE_DEACTIVATE) {
+		PG(memory_limit) = value;
+	} else {
+		zend_alter_ini_entry(ZSTR_KNOWN(ZEND_STR_MEMORY_LIMIT), new_value, PHP_INI_ALL, stage);
+	}
 	
 	return SUCCESS;
 }
diff -Naur a/Zend/zend_string.h b/Zend/zend_string.h
--- a/Zend/zend_string.h	2026-10-19 19:02:46.000000000 +0200
+++ b/Zend/zend_string.h	2026-10-21 15:48:33.791404255 +0200
@@ -716,6 +716,7 @@
 	_(ZEND_STR_SINCE,                  "since") \
 	_(ZEND_STR_GET,                    "get") \
 	_(ZEND_STR_SET,                    "set") \
+	_(ZEND_STR_MEMORY_LIMIT,           "memory_limit") \
 	_(ZEND_STR_8_DOT_0,                "8.0") \
 	_(ZEND_STR_8_DOT_1,                "8.1") \
 	_(ZEND_STR_8_DOT_2,                "8.2") \