diff --git a/src/bin/jp2/convert.c b/src/bin/jp2/convert.c
index 059f4aec..9baf5723 100644
--- a/src/bin/jp2/convert.c
+++ b/src/bin/jp2/convert.c
@@ -3053,6 +3053,7 @@ static int imagetoraw_common(opj_image_t * image, const char *outfile, OPJ_BOOL
     int line, row, curr, mask;
     int *ptr;
     unsigned char uc;
+    (void)big_endian;
 
     if((image->numcomps * image->x1 * image->y1) == 0)
     {
diff --git a/src/bin/jpip/opj_jpip_transcode.c b/src/bin/jpip/opj_jpip_transcode.c
index 83232d67..6776f1a6 100644
--- a/src/bin/jpip/opj_jpip_transcode.c
+++ b/src/bin/jpip/opj_jpip_transcode.c
@@ -42,7 +42,7 @@
  *   or
  *   % ./jpip_to_jp2 input.jpp output.jp2
  */
-static int jpip_to_jp2(int argc,char *argv[])
+static int jpip_to_jp2(char *argv[])
 {
   jpip_dec_param_t *dec;
     
@@ -74,7 +74,7 @@ static int jpip_to_jp2(int argc,char *argv[])
  *   or
  *   % ./jpip_to_j2k input.jpp output.j2k
  */
-static int jpip_to_j2k(int argc,char *argv[])
+static int jpip_to_j2k(char *argv[])
 {
   jpip_dec_param_t *dec;
   
@@ -111,11 +111,11 @@ int main(int argc,char *argv[])
     /* strcasecmp ? */
     if( strcmp(ext, ".jp2" ) == 0 )
       {
-      return jpip_to_jp2(argc,argv);
+      return jpip_to_jp2(argv);
       }
     if( strcmp(ext, ".j2k" ) == 0 )
       {
-      return jpip_to_j2k(argc,argv);
+      return jpip_to_j2k(argv);
       }
     }
 
diff --git a/tests/unit/testempty0.c b/tests/unit/testempty0.c
index 8edd2a6c..09850604 100644
--- a/tests/unit/testempty0.c
+++ b/tests/unit/testempty0.c
@@ -1,3 +1,7 @@
 #include "openjpeg.h"
 
-int main(int argc, char **argv) { return 0; }
+int main(int argc, char **argv) {
+  (void)argc;
+  (void)argv;
+  return 0; 
+}