diff --git a/ChangeLog b/ChangeLog
index 68819688..1b6550e4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -16,6 +16,8 @@ November 14, 2007
 		them in the encoder, getting the decoder to do it was tricky enough... I also split opj_tcd_cblk_t into separate 
 		encode and decode versions. A lot of fields were not used by both, so this cuts its size even further.
 
+* [FOD] Avoided ABI breakage
+
 November 13, 2007
 ! [FOD] Patch by Dzonatas and Callum Lerwick.
         Fp/vectorization patch which basically converts most of the irreversible decode codepath to floating point,
diff --git a/libopenjpeg/openjpeg.h b/libopenjpeg/openjpeg.h
index 015c2554..e82e4e07 100644
--- a/libopenjpeg/openjpeg.h
+++ b/libopenjpeg/openjpeg.h
@@ -303,6 +303,10 @@ typedef struct opj_cparameters {
 	char infile[OPJ_PATH_LEN];
 	/** output file name */
 	char outfile[OPJ_PATH_LEN];
+	/** DEPRECATED. Index generation is now handeld with the opj_encode_with_info() function. Set to NULL */
+	int index_on;
+	/** DEPRECATED. Index generation is now handeld with the opj_encode_with_info() function. Set to NULL */
+	char index[OPJ_PATH_LEN];
 	/** subimage encoding: origin image offset in x direction */
 	int image_offset_x0;
 	/** subimage encoding: origin image offset in y direction */
@@ -486,7 +490,7 @@ typedef struct opj_cio {
 	/** pointer to the start of the buffer */
 	unsigned char *buffer;
 	/** buffer size in bytes */
-	unsigned int length;
+	int length;
 
 	/** pointer to the start of the stream */
 	unsigned char *start;