diff --git a/CHANGES b/CHANGES
index 82c68804..7a4740dc 100644
--- a/CHANGES
+++ b/CHANGES
@@ -5,6 +5,9 @@ What's New for OpenJPEG
 ! : changed
 + : added
 
+August 10, 2011
+! [mickael] removed unused parameters warnings with the solution proposed by myself and Bob Friesenhahn.
+
 August 9, 2011
 - [antonin] removed xcode project files (cmake and autotools are now the only supported build methods)
 
diff --git a/applications/codec/j2k_dump.c b/applications/codec/j2k_dump.c
index b0f44043..02f8316c 100644
--- a/applications/codec/j2k_dump.c
+++ b/applications/codec/j2k_dump.c
@@ -200,8 +200,10 @@ int parse_cmdline_decoder(int argc, char **argv, opj_dparameters_t *parameters,i
 	option_t long_option[]={
 		{"ImgDir",REQ_ARG, NULL ,'y'},
 	};
-
 	const char optlist[] = "i:o:h";
+
+	OPJ_ARG_NOT_USED(indexfilename);
+
 	totlen=sizeof(long_option);
 	img_fol->set_out_format = 0;
 	do {
diff --git a/libopenjpeg/j2k.c b/libopenjpeg/j2k.c
index 0b09899a..0a58a81a 100644
--- a/libopenjpeg/j2k.c
+++ b/libopenjpeg/j2k.c
@@ -297,6 +297,9 @@ static int j2k_get_num_tp(opj_cp_t *cp,int pino,int tileno){
 /**	mem allocation for TLM marker*/
 int j2k_calculate_tp(opj_cp_t *cp,int img_numcomp,opj_image_t *image,opj_j2k_t *j2k ){
 	int pino,tileno,totnum_tp=0;
+
+	OPJ_ARG_NOT_USED(img_numcomp);
+
 	j2k->cur_totnum_tp = (int *) opj_malloc(cp->tw * cp->th * sizeof(int));
 	for (tileno = 0; tileno < cp->tw * cp->th; tileno++) {
 		int cur_totnum_tp = 0;
@@ -1848,8 +1851,9 @@ opj_image_t* j2k_decode_jpt_stream(opj_j2k_t *j2k, opj_cio_t *cio,  opj_codestre
 	opj_jpt_msg_header_t header;
 	int position;
 
+	OPJ_ARG_NOT_USED(cstr_info);
+
 	opj_common_ptr cinfo = j2k->cinfo;
-	
 	j2k->cio = cio;
 
 	/* create an empty image */
diff --git a/libopenjpeg/jp2.c b/libopenjpeg/jp2.c
index 39d48a5f..9c9c476f 100644
--- a/libopenjpeg/jp2.c
+++ b/libopenjpeg/jp2.c
@@ -398,6 +398,9 @@ static opj_bool jp2_read_pclr(opj_jp2_t *jp2, opj_cio_t *cio,
 	unsigned short i, j;
 	unsigned char uc;
 
+	OPJ_ARG_NOT_USED(box);
+	OPJ_ARG_NOT_USED(jp2);
+
 /* Part 1, I.5.3.4: 'There shall be at most one Palette box inside
  * a JP2 Header box' :
 */
@@ -446,6 +449,9 @@ static opj_bool jp2_read_cmap(opj_jp2_t *jp2, opj_cio_t *cio,
 	opj_jp2_cmap_comp_t *cmap;
 	unsigned short i, nr_channels;
 
+	OPJ_ARG_NOT_USED(box);
+	OPJ_ARG_NOT_USED(jp2);
+
 /* Need nr_channels: */
 	if(color->jp2_pclr == NULL) return OPJ_FALSE;
 
@@ -511,6 +517,9 @@ static opj_bool jp2_read_cdef(opj_jp2_t *jp2, opj_cio_t *cio,
 	opj_jp2_cdef_info_t *info;
 	unsigned short i, n;
 
+	OPJ_ARG_NOT_USED(box);
+	OPJ_ARG_NOT_USED(jp2);
+
 /* Part 1, I.5.3.6: 'The shall be at most one Channel Definition box
  * inside a JP2 Header box.' 
 */
diff --git a/libopenjpeg/openjpeg.c b/libopenjpeg/openjpeg.c
index 790f2eea..00a910ec 100644
--- a/libopenjpeg/openjpeg.c
+++ b/libopenjpeg/openjpeg.c
@@ -36,6 +36,10 @@
 #ifndef OPJ_STATIC
 BOOL APIENTRY
 DllMain(HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) {
+
+	OPJ_ARG_NOT_USED(lpReserved);
+	OPJ_ARG_NOT_USED(hModule);
+
 	switch (ul_reason_for_call) {
 		case DLL_PROCESS_ATTACH :
 			break;
diff --git a/libopenjpeg/opj_includes.h b/libopenjpeg/opj_includes.h
index 53a0c4a7..8da9dbdc 100644
--- a/libopenjpeg/opj_includes.h
+++ b/libopenjpeg/opj_includes.h
@@ -104,6 +104,9 @@ static INLINE long lrintf(float f){
 }
 #endif
 
+// Avoid compile-time warning because parameter is not used
+#define OPJ_ARG_NOT_USED(x) (void)(x)
+
 #include "j2k_lib.h"
 #include "opj_malloc.h"
 #include "event.h"
diff --git a/libopenjpeg/t1.c b/libopenjpeg/t1.c
index 002a82d4..b3ede36a 100644
--- a/libopenjpeg/t1.c
+++ b/libopenjpeg/t1.c
@@ -382,9 +382,10 @@ static INLINE void t1_dec_sigpass_step_raw(
 		int vsc)
 {
 	int v, flag;
-	
 	opj_raw_t *raw = t1->raw;	/* RAW component */
 	
+	OPJ_ARG_NOT_USED(orient);
+	
 	flag = vsc ? ((*flagsp) & (~(T1_SIG_S | T1_SIG_SE | T1_SIG_SW | T1_SGN_S))) : (*flagsp);
 	if ((flag & T1_SIG_OTH) && !(flag & (T1_SIG | T1_VISIT))) {
 			if (raw_decode(raw)) {
@@ -823,9 +824,10 @@ static void t1_dec_clnpass_step_partial(
 		int oneplushalf)
 {
 	int v, flag;
-	
 	opj_mqc_t *mqc = t1->mqc;	/* MQC component */
 	
+	OPJ_ARG_NOT_USED(orient);
+	
 	flag = *flagsp;
 	mqc_setcurctx(mqc, t1_getctxno_sc(flag));
 	v = mqc_decode(mqc) ^ t1_getspb(flag);
diff --git a/libopenjpeg/tcd.c b/libopenjpeg/tcd.c
index 26548564..fc25179a 100644
--- a/libopenjpeg/tcd.c
+++ b/libopenjpeg/tcd.c
@@ -676,6 +676,8 @@ void tcd_malloc_decode_tile(opj_tcd_t *tcd, opj_image_t * image, opj_cp_t * cp,
 	opj_tcp_t *tcp;
 	opj_tcd_tile_t *tile;
 
+	OPJ_ARG_NOT_USED(cstr_info);
+
 	tcd->cp = cp;
 	
 	tcp = &(cp->tcps[cp->tileno[tileno]]);