diff --git a/NEWS b/NEWS
index 7706b79823242..06d31bcf4f2b0 100644
--- a/NEWS
+++ b/NEWS
@@ -14,6 +14,9 @@ PHP                                                                        NEWS
   . array out of bounds, stack overflow handled for segfault handler on windows.
     (David Carlier)
 
+- Random:
+  . lcg_value() is now deprecated. (timwolla)
+
 - Standard:
   . Unserializing the uppercase 'S' tag is now deprecated. (timwolla)
 
diff --git a/UPGRADING b/UPGRADING
index e7a1fa340c153..d25eb35383b8b 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -434,6 +434,11 @@ PHP 8.4 UPGRADE NOTES
     3-parameter signature with a null $row parameter instead.
   . Added pg_result_memory_size to get the visibility the memory used by a query result.
 
+- Random:
+  . lcg_value() is deprecated, as the function is broken in multiple ways.
+    Use \Random\Randomizer::getFloat() instead.
+    RFC: https://wiki.php.net/rfc/deprecations_php_8_4
+
 - Reflection:
   . Calling ReflectionMethod::__construct() with 1 argument is deprecated.
     Use ReflectionMethod::createFromMethodName() instead.
diff --git a/ext/random/random.c b/ext/random/random.c
index 5db20eb6db4e5..102ee0ebde8a5 100644
--- a/ext/random/random.c
+++ b/ext/random/random.c
@@ -27,6 +27,7 @@
 
 #include "php.h"
 
+#include "Zend/zend_attributes.h"
 #include "Zend/zend_enum.h"
 #include "Zend/zend_exceptions.h"
 
diff --git a/ext/random/random.stub.php b/ext/random/random.stub.php
index 1b40294e60f41..fc3b178e55fff 100644
--- a/ext/random/random.stub.php
+++ b/ext/random/random.stub.php
@@ -15,6 +15,7 @@
      */
     const MT_RAND_PHP = UNKNOWN;
 
+    #[\Deprecated(since: '8.4', message: "use \\Random\\Randomizer::getFloat() instead")]
     function lcg_value(): float {}
 
     function mt_srand(?int $seed = null, int $mode = MT_RAND_MT19937): void {}
diff --git a/ext/random/random_arginfo.h b/ext/random/random_arginfo.h
index 82df476ed125a..fcb96380c6f0e 100644
--- a/ext/random/random_arginfo.h
+++ b/ext/random/random_arginfo.h
@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: 35cb16abb3392bd257a43cc675cad4f5af5549c1 */
+ * Stub hash: fad14b8b8abaf9f33d7837ba8f6190c5d10ff63f */
 
 ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(arginfo_lcg_value, 0, 0, IS_DOUBLE, 0)
 ZEND_END_ARG_INFO()
@@ -155,7 +155,7 @@ ZEND_METHOD(Random_Randomizer, __serialize);
 ZEND_METHOD(Random_Randomizer, __unserialize);
 
 static const zend_function_entry ext_functions[] = {
-	ZEND_FE(lcg_value, arginfo_lcg_value)
+	ZEND_RAW_FENTRY("lcg_value", zif_lcg_value, arginfo_lcg_value, ZEND_ACC_DEPRECATED, NULL, NULL)
 	ZEND_FE(mt_srand, arginfo_mt_srand)
 	ZEND_RAW_FENTRY("srand", zif_mt_srand, arginfo_srand, 0, NULL, NULL)
 	ZEND_FE(rand, arginfo_rand)
@@ -247,6 +247,19 @@ static void register_random_symbols(int module_number)
 {
 	REGISTER_LONG_CONSTANT("MT_RAND_MT19937", MT_RAND_MT19937, CONST_PERSISTENT);
 	REGISTER_LONG_CONSTANT("MT_RAND_PHP", MT_RAND_PHP, CONST_PERSISTENT | CONST_DEPRECATED);
+
+
+	zend_attribute *attribute_Deprecated_func_lcg_value_0 = zend_add_function_attribute(zend_hash_str_find_ptr(CG(function_table), "lcg_value", sizeof("lcg_value") - 1), ZSTR_KNOWN(ZEND_STR_DEPRECATED), 2);
+	zval attribute_Deprecated_func_lcg_value_0_arg0;
+	zend_string *attribute_Deprecated_func_lcg_value_0_arg0_str = zend_string_init("8.4", strlen("8.4"), 1);
+	ZVAL_STR(&attribute_Deprecated_func_lcg_value_0_arg0, attribute_Deprecated_func_lcg_value_0_arg0_str);
+	ZVAL_COPY_VALUE(&attribute_Deprecated_func_lcg_value_0->args[0].value, &attribute_Deprecated_func_lcg_value_0_arg0);
+	attribute_Deprecated_func_lcg_value_0->args[0].name = ZSTR_KNOWN(ZEND_STR_SINCE);
+	zval attribute_Deprecated_func_lcg_value_0_arg1;
+	zend_string *attribute_Deprecated_func_lcg_value_0_arg1_str = zend_string_init("use \\Random\\Randomizer::getFloat() instead", strlen("use \\Random\\Randomizer::getFloat() instead"), 1);
+	ZVAL_STR(&attribute_Deprecated_func_lcg_value_0_arg1, attribute_Deprecated_func_lcg_value_0_arg1_str);
+	ZVAL_COPY_VALUE(&attribute_Deprecated_func_lcg_value_0->args[1].value, &attribute_Deprecated_func_lcg_value_0_arg1);
+	attribute_Deprecated_func_lcg_value_0->args[1].name = ZSTR_KNOWN(ZEND_STR_MESSAGE);
 }
 
 static zend_class_entry *register_class_Random_Engine_Mt19937(zend_class_entry *class_entry_Random_Engine)
diff --git a/ext/random/tests/01_functions/lcg_value_basic.phpt b/ext/random/tests/01_functions/lcg_value_basic.phpt
index ca76b5c836044..3271efc061e29 100644
--- a/ext/random/tests/01_functions/lcg_value_basic.phpt
+++ b/ext/random/tests/01_functions/lcg_value_basic.phpt
@@ -8,7 +8,7 @@ echo "MATHS test script started\n";
 
 echo "\n lcg_value tests...\n";
 for ($i = 0; $i < 100; $i++) {
-    $res = lcg_value();
+    $res = @lcg_value();
 
     if (!is_float($res) || $res < 0 || $res > 1) {
         break;
diff --git a/ext/random/tests/01_functions/lcg_value_deprecation.phpt b/ext/random/tests/01_functions/lcg_value_deprecation.phpt
new file mode 100644
index 0000000000000..850e0201187a9
--- /dev/null
+++ b/ext/random/tests/01_functions/lcg_value_deprecation.phpt
@@ -0,0 +1,11 @@
+--TEST--
+lcg_value() deprecation
+--FILE--
+<?php
+
+var_dump(lcg_value());
+
+?>
+--EXPECTF--
+Deprecated: Function lcg_value() is deprecated since 8.4, use \Random\Randomizer::getFloat() instead in %s on line %d
+float(%f)