diff --git a/NEWS b/NEWS
index 548349b4063..4798f3e407b 100644
--- a/NEWS
+++ b/NEWS
@@ -15,6 +15,8 @@ PHP                                                                        NEWS
     configured). (nielsdos)
   . Fixed bug GH-19719 (Allow empty statements before declare(strict_types)).
     (nielsdos)
+  . Casting floats that are not representable as ints now emits a warning.
+    (Girgias)
 
 - Curl:
   . Fix cloning of CURLOPT_POSTFIELDS when using the clone operator instead
diff --git a/UPGRADING b/UPGRADING
index e0974f16e4a..c84a373d857 100644
--- a/UPGRADING
+++ b/UPGRADING
@@ -55,6 +55,10 @@ PHP 8.5 UPGRADE NOTES
   . Destructing non-array values (other than NULL) using [] or list() now
     emits a warning.
     RFC: https://wiki.php.net/rfc/warnings-php-8-5#destructuring_non-array_values
+  . A warning is now emitted when casting floats (or strings that look like
+    floats) to int if they cannot be represented as one. This affects explicit
+    int casts and implicit int casts.
+    RFC: https://wiki.php.net/rfc/warnings-php-8-5#casting_out_of_range_floats_to_int
 
 - BZ2:
   . bzcompress() now throws a ValueError when $block_size is not between