diff -rupN --no-dereference freetype-2.11.0/src/base/ftobjs.c freetype-2.11.0-new/src/base/ftobjs.c

--- freetype-2.11.0/src/base/ftobjs.c	2021-07-15 12:09:04.000000000 +0200

+++ freetype-2.11.0-new/src/base/ftobjs.c	2022-04-27 18:49:57.376406531 +0200

@@ -2451,6 +2451,15 @@

 #endif

+    /* only use lower 31 bits together with sign bit */

+    if ( face_index > 0 )

+      face_index &= 0x7FFFFFFFL;

+    else

+    {

+      face_index &= 0x7FFFFFFFL;

+      face_index  = -face_index;

+    }

+

 #ifdef FT_DEBUG_LEVEL_TRACE

     FT_TRACE3(( "FT_Open_Face: " ));

     if ( face_index < 0 )