diff --git a/gift-cofb/Implementations/crypto_aead/giftcofb128v1/armcortexm_compact/giftb128.s b/gift-cofb/Implementations/crypto_aead/giftcofb128v1/armcortexm_compact/giftb128.s
index 1cd3901..d080c7a 100644
--- a/gift-cofb/Implementations/crypto_aead/giftcofb128v1/armcortexm_compact/giftb128.s
+++ b/gift-cofb/Implementations/crypto_aead/giftcofb128v1/armcortexm_compact/giftb128.s
@@ -224,7 +224,7 @@ rearrange_rkey_3:
 .global gift128_keyschedule
 .type   gift128_keyschedule,%function
 gift128_keyschedule:
-    push    {r2-r12, r14}
+    push    {r1-r12, r14}
     ldm     r0, {r4-r7}             //load key words
     rev     r4, r4
     rev     r5, r5
@@ -328,8 +328,7 @@ gift128_keyschedule:
     bl      rearrange_rkey_3
     add.w   r1, r1, #40
     bl      rearrange_rkey_3
-    sub.w   r1, r1, #312
-    pop    {r2-r12, r14}
+    pop     {r1-r12, r14}
     bx      lr
 
 .align 2