diff --git a/vp8/encoder/arm/armv5te/boolhuff_armv5te.asm b/vp8/encoder/arm/armv5te/boolhuff_armv5te.asm
index 138ed46..30513f9 100644
--- a/vp8/encoder/arm/armv5te/boolhuff_armv5te.asm
+++ b/vp8/encoder/arm/armv5te/boolhuff_armv5te.asm
@@ -24,8 +24,9 @@
 
 ; r0 BOOL_CODER *br
 ; r1 unsigned char *source
-
+; r2 unsigned char *source_end
 |vp8_start_encode| PROC
+    str     r2,  [r0, #vp8_writer_buffer_end]
     mov     r12, #0
     mov     r3,  #255
     mvn     r2,  #23
diff --git a/vp8/encoder/asm_enc_offsets.c b/vp8/encoder/asm_enc_offsets.c
index c79e915..d05dab4 100644
--- a/vp8/encoder/asm_enc_offsets.c
+++ b/vp8/encoder/asm_enc_offsets.c
@@ -49,6 +49,7 @@
 DEFINE(vp8_writer_count,                        offsetof(vp8_writer, count));
 DEFINE(vp8_writer_pos,                          offsetof(vp8_writer, pos));
 DEFINE(vp8_writer_buffer,                       offsetof(vp8_writer, buffer));
+DEFINE(vp8_writer_buffer_end,                   offsetof(vp8_writer, buffer_end));
 
 DEFINE(tokenextra_token,                        offsetof(TOKENEXTRA, Token));
 DEFINE(tokenextra_extra,                        offsetof(TOKENEXTRA, Extra));