--- thunderbird-91.1.1/modules/fdlibm/src/math_private.h.orig	2021-09-16 18:04:11.000000000 +0200
+++ thunderbird-91.1.1/modules/fdlibm/src/math_private.h	2021-09-20 09:14:38.327837986 +0200
@@ -30,8 +30,7 @@
  * Adapted from https://github.com/freebsd/freebsd-src/search?q=__double_t
  */
 
-typedef double      __double_t;
-typedef __double_t  double_t;
+typedef double_t __double_t;
 
 /*
  * The original fdlibm code used statements like: