--- a/newlib/libc/sys/arm/trap.S	2016-03-29 23:33:42.000000000 +0200
+++ b/newlib/libc/sys/arm/trap.S	2018-04-20 12:10:24.093416964 +0200
@@ -85,7 +85,7 @@ __rt_stkovf_split_big:
         @        protects the data against any events that may try and use
         @        the stack.
 
-        SUB     ip, sp, ip      @ extra stack required for function
+        @SUB     ip, sp, ip      @ extra stack required for function
         @ Add stack extension code here.  If desired a new stack chunk
         @ can be allocated, and the register state updated suitably.