diff --git a/src/encmain.c b/src/encmain.c
index 170be23c..2ee58c26 100644
--- a/src/encmain.c
+++ b/src/encmain.c
@@ -213,7 +213,7 @@ int main(int argc, char *argv[])
       kvz_picture *img_rec = NULL;
       uint32_t len_out = 0;
       kvz_frame_info info_out;
-      if (!api->encoder_encode(enc, img_in, &chunks_out, &len_out, &img_rec, &info_out)) {
+      if (!api->encoder_encode(enc, img_in, &chunks_out, &len_out, &img_rec, NULL, &info_out)) {
         fprintf(stderr, "Failed to encode image.\n");
         api->picture_free(img_in);
         goto exit_failure;
diff --git a/src/kvazaar.c b/src/kvazaar.c
index 7d6c48b3..59d24d05 100644
--- a/src/kvazaar.c
+++ b/src/kvazaar.c
@@ -127,11 +127,13 @@ static int kvazaar_encode(kvz_encoder *enc,
                           kvz_data_chunk **data_out,
                           uint32_t *len_out,
                           kvz_picture **pic_out,
+                          kvz_picture **src_out,
                           kvz_frame_info *info_out)
 {
   if (data_out) *data_out = NULL;
   if (len_out) *len_out = 0;
   if (pic_out) *pic_out = NULL;
+  if (src_out) *src_out = NULL;
 
   encoder_state_t *state = &enc->states[enc->cur_state_num];
 
@@ -174,6 +176,7 @@ static int kvazaar_encode(kvz_encoder *enc,
     if (len_out) *len_out = kvz_bitstream_tell(&output_state->stream) / 8;
     if (data_out) *data_out = kvz_bitstream_take_chunks(&output_state->stream);
     if (pic_out) *pic_out = kvz_image_copy_ref(output_state->tile->frame->rec);
+    if (src_out) *src_out = kvz_image_copy_ref(output_state->tile->frame->source);
     if (info_out) set_frame_info(info_out, output_state);
 
     output_state->frame_done = 1;
diff --git a/src/kvazaar.h b/src/kvazaar.h
index d46db10e..a0939d24 100644
--- a/src/kvazaar.h
+++ b/src/kvazaar.h
@@ -344,9 +344,9 @@ typedef struct kvz_api {
    * \brief Encode one frame.
    *
    * Add pic_in to the encoding pipeline. If an encoded frame is ready, return
-   * the bitstream, length of the bitstream, the reconstructed frame and frame
-   * info in data_out, len_out, pic_out and info_out, respectively. Otherwise,
-   * set the output parameters to NULL.
+   * the bitstream, length of the bitstream, the reconstructed frame, the
+   * original frame and frame info in data_out, len_out, pic_out, src_out and
+   * info_out, respectively. Otherwise, set the output parameters to NULL.
    *
    * After passing all of the input frames, the caller should keep calling this
    * function with pic_in set to NULL, until no more data is returned in the
@@ -354,17 +354,19 @@ typedef struct kvz_api {
    *
    * The caller must not modify pic_in after passing it to this function.
    *
-   * If pic_out and data_out are set to non-NULL values, the caller is
-   * responsible for calling picture_free and chunk_free on them.
+   * If data_out, pic_out and src_out are set to non-NULL values, the caller is
+   * responsible for calling chunk_free and picture_free on them.
    *
    * A null pointer may be passed in place of any of the parameters data_out,
-   * len_out, pic_out or info_out to skip returning the corresponding value.
+   * len_out, pic_out, src_out or info_out to skip returning the corresponding
+   * value.
    *
    * \param encoder   encoder
    * \param pic_in    input frame or NULL
    * \param data_out  Returns the encoded data.
    * \param len_out   Returns number of bytes in the encoded data.
    * \param pic_out   Returns the reconstructed picture.
+   * \param src_out   Returns the original picture.
    * \param info_out  Returns information about the encoded picture.
    * \return          1 on success, 0 on error.
    */
@@ -373,6 +375,7 @@ typedef struct kvz_api {
                                   kvz_data_chunk **data_out,
                                   uint32_t *len_out,
                                   kvz_picture **pic_out,
+                                  kvz_picture **src_out,
                                   kvz_frame_info *info_out);
 } kvz_api;
 
diff --git a/src/kvazaar_version.h b/src/kvazaar_version.h
index 8584c4ae..9f4d2453 100644
--- a/src/kvazaar_version.h
+++ b/src/kvazaar_version.h
@@ -21,6 +21,6 @@
 ****************************************************************************/
 
 // KVZ_API_VERSION is incremented every time the public api changes.
-#define KVZ_API_VERSION 6
+#define KVZ_API_VERSION 7
 
 #endif // KVAZAAR_VERSION_H_