--- build/moz.configure/init.configure.orig	2019-05-07 22:00:08.566365184 +0100
+++ build/moz.configure/init.configure	2019-05-07 22:03:54.337564868 +0100
@@ -662,7 +662,7 @@
 
     # The CPU granularity is probably not enough. Moving more things from
     # old-configure will tell us if we need more
-    if cpu.endswith('86') or (cpu.startswith('i') and '86' in cpu):
+    if cpu.endswith('586') or (cpu.startswith('i') and '586' in cpu):
         canonical_cpu = 'x86'
         endianness = 'little'
     elif cpu in ('x86_64', 'ia64'):