diff --git a/NEWS b/NEWS
index a63b79ed1302..e43ac799f4eb 100644
--- a/NEWS
+++ b/NEWS
@@ -68,6 +68,8 @@ PHP                                                                        NEWS
     brigade. (ndossche, Matthias Goergens, Jakub Zelenka)
   . Fixed bug GH-24175 (Use-after-free when pclose() closes a stream from its
     user filter). (Edmond)
+  . Fixed bug GH-15701 (Build failure: incompatible funopen() seeker pointer
+    type on 32-bit platforms). (Kamil Tekiela)
 
 19 Nov 2026, PHP 8.4.28
 
diff --git a/main/streams/cast.c b/main/streams/cast.c
index 6e5c63fb3b29..c88dd8be9e7a 100644
--- a/main/streams/cast.c
+++ b/main/streams/cast.c
@@ -79,10 +79,10 @@ static int stream_cookie_writer(void *cookie, const char *buffer, int size)
 	return php_stream_write((php_stream *)cookie, (char *)buffer, size);
 }
 
-static PHP_FPOS_T stream_cookie_seeker(void *cookie, zend_off_t position, int whence)
+static PHP_FPOS_T stream_cookie_seeker(void *cookie, PHP_FPOS_T position, int whence)
 {
 
-	return (PHP_FPOS_T)php_stream_seek((php_stream *)cookie, position, whence);
+	return (PHP_FPOS_T)php_stream_seek((php_stream *)cookie, (zend_off_t)position, whence);
 }
 
 static int stream_cookie_closer(void *cookie)