diff --git a/vp9/decoder/vp9_read_bit_buffer.c b/vp9/decoder/vp9_read_bit_buffer.c
new file mode 100644
index 000000000..778a635e3
--- /dev/null
+++ b/vp9/decoder/vp9_read_bit_buffer.c
@@ -0,0 +1,41 @@
+/*
+ *  Copyright (c) 2013 The WebM project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+#include "vp9/decoder/vp9_read_bit_buffer.h"
+
+size_t vp9_rb_bytes_read(struct vp9_read_bit_buffer *rb) {
+  return rb->bit_offset / CHAR_BIT + (rb->bit_offset % CHAR_BIT > 0);
+}
+
+int vp9_rb_read_bit(struct vp9_read_bit_buffer *rb) {
+  const size_t off = rb->bit_offset;
+  const size_t p = off / CHAR_BIT;
+  const int q = CHAR_BIT - 1 - (int)off % CHAR_BIT;
+  if (rb->bit_buffer + p >= rb->bit_buffer_end) {
+    rb->error_handler(rb->error_handler_data);
+    return 0;
+  } else {
+    const int bit = (rb->bit_buffer[p] & (1 << q)) >> q;
+    rb->bit_offset = off + 1;
+    return bit;
+  }
+}
+
+int vp9_rb_read_literal(struct vp9_read_bit_buffer *rb, int bits) {
+  int value = 0, bit;
+  for (bit = bits - 1; bit >= 0; bit--)
+    value |= vp9_rb_read_bit(rb) << bit;
+  return value;
+}
+
+int vp9_rb_read_signed_literal(struct vp9_read_bit_buffer *rb,
+                               int bits) {
+  const int value = vp9_rb_read_literal(rb, bits);
+  return vp9_rb_read_bit(rb) ? -value : value;
+}
diff --git a/vp9/decoder/vp9_read_bit_buffer.h b/vp9/decoder/vp9_read_bit_buffer.h
index 8cb424703..fc88bd70a 100644
--- a/vp9/decoder/vp9_read_bit_buffer.h
+++ b/vp9/decoder/vp9_read_bit_buffer.h
@@ -30,36 +30,13 @@ struct vp9_read_bit_buffer {
   vp9_rb_error_handler error_handler;
 };
 
-static size_t vp9_rb_bytes_read(struct vp9_read_bit_buffer *rb) {
-  return rb->bit_offset / CHAR_BIT + (rb->bit_offset % CHAR_BIT > 0);
-}
+size_t vp9_rb_bytes_read(struct vp9_read_bit_buffer *rb);
 
-static int vp9_rb_read_bit(struct vp9_read_bit_buffer *rb) {
-  const size_t off = rb->bit_offset;
-  const size_t p = off / CHAR_BIT;
-  const int q = CHAR_BIT - 1 - (int)off % CHAR_BIT;
-  if (rb->bit_buffer + p >= rb->bit_buffer_end) {
-    rb->error_handler(rb->error_handler_data);
-    return 0;
-  } else {
-    const int bit = (rb->bit_buffer[p] & (1 << q)) >> q;
-    rb->bit_offset = off + 1;
-    return bit;
-  }
-}
+int vp9_rb_read_bit(struct vp9_read_bit_buffer *rb);
 
-static int vp9_rb_read_literal(struct vp9_read_bit_buffer *rb, int bits) {
-  int value = 0, bit;
-  for (bit = bits - 1; bit >= 0; bit--)
-    value |= vp9_rb_read_bit(rb) << bit;
-  return value;
-}
+int vp9_rb_read_literal(struct vp9_read_bit_buffer *rb, int bits);
 
-static int vp9_rb_read_signed_literal(struct vp9_read_bit_buffer *rb,
-                                      int bits) {
-  const int value = vp9_rb_read_literal(rb, bits);
-  return vp9_rb_read_bit(rb) ? -value : value;
-}
+int vp9_rb_read_signed_literal(struct vp9_read_bit_buffer *rb, int bits);
 
 #ifdef __cplusplus
 }  // extern "C"
diff --git a/vp9/vp9dx.mk b/vp9/vp9dx.mk
index de210f4b7..e19ca1151 100644
--- a/vp9/vp9dx.mk
+++ b/vp9/vp9dx.mk
@@ -25,6 +25,7 @@ VP9_DX_SRCS-yes += decoder/vp9_dthread.c
 VP9_DX_SRCS-yes += decoder/vp9_dthread.h
 VP9_DX_SRCS-yes += decoder/vp9_reader.h
 VP9_DX_SRCS-yes += decoder/vp9_reader.c
+VP9_DX_SRCS-yes += decoder/vp9_read_bit_buffer.c
 VP9_DX_SRCS-yes += decoder/vp9_read_bit_buffer.h
 VP9_DX_SRCS-yes += decoder/vp9_decodemv.h
 VP9_DX_SRCS-yes += decoder/vp9_detokenize.h