diff --git a/src/lib/openjpip/j2kheader_manager.c b/src/lib/openjpip/j2kheader_manager.c
index 1e964516..519a47b5 100644
--- a/src/lib/openjpip/j2kheader_manager.c
+++ b/src/lib/openjpip/j2kheader_manager.c
@@ -117,6 +117,7 @@ CODmarker_param_t get_CODmkrdata_from_j2kstream( Byte_t *CODstream)
 
   if( *CODstream++ != 0xff || *CODstream++ != 0x52){
     fprintf( FCGI_stderr, "Error, COD marker not found in the reconstructed j2kstream\n");
+    memset(&COD, 0, sizeof(COD));
     return COD;
   }
   
diff --git a/tests/test_tile_decoder.c b/tests/test_tile_decoder.c
index 26d3a16c..e5b851e8 100644
--- a/tests/test_tile_decoder.c
+++ b/tests/test_tile_decoder.c
@@ -178,7 +178,7 @@ int main (int argc, char *argv[])
         int da_y0=0;
         int da_x1=1000;
         int da_y1=1000;
-        char input_file[64];
+        const char *input_file;
 
         /* should be test_tile_decoder 0 0 1000 1000 tte1.j2k */
         if( argc == 6 )
@@ -187,7 +187,7 @@ int main (int argc, char *argv[])
                 da_y0=atoi(argv[2]);
                 da_x1=atoi(argv[3]);
                 da_y1=atoi(argv[4]);
-                strcpy(input_file,argv[5]);
+                input_file = argv[5];
 
         }
         else
@@ -196,7 +196,7 @@ int main (int argc, char *argv[])
                 da_y0=0;
                 da_x1=1000;
                 da_y1=1000;
-                strcpy(input_file,"test.j2k");
+                input_file = "test.j2k";
         }
 
         if (! l_data) {
diff --git a/tests/test_tile_encoder.c b/tests/test_tile_encoder.c
index d01a7e52..bd3fe351 100644
--- a/tests/test_tile_encoder.c
+++ b/tests/test_tile_encoder.c
@@ -69,7 +69,7 @@ int main (int argc, char *argv[])
 	opj_stream_t * l_stream;
 	OPJ_UINT32 l_nb_tiles;
 	OPJ_UINT32 l_data_size;
-	unsigned char len;
+	size_t len;
 
 #ifdef USING_MCT
 	const OPJ_FLOAT32 l_mct [] =
@@ -96,7 +96,7 @@ int main (int argc, char *argv[])
   int tile_height;
   int comp_prec;
   int irreversible;
-  char output_file[64];
+  const char *output_file;
 
   /* should be test_tile_encoder 3 2000 2000 1000 1000 8 tte1.j2k */
   if( argc == 9 )
@@ -108,7 +108,7 @@ int main (int argc, char *argv[])
     tile_height = atoi( argv[5] );
     comp_prec = atoi( argv[6] );
     irreversible = atoi( argv[7] );
-    strcpy(output_file, argv[8] );
+    output_file = argv[8];
     }
   else
     {
@@ -119,7 +119,7 @@ int main (int argc, char *argv[])
     tile_height = 1000;
     comp_prec = 8;
     irreversible = 1;
-    strcpy(output_file, "test.j2k" );
+    output_file = "test.j2k";
     }
   if( num_comps > NUM_COMPS_MAX )
     {
@@ -228,7 +228,7 @@ int main (int argc, char *argv[])
 	}
 
   /* should we do j2k or jp2 ?*/
-  len = (unsigned char)strlen( output_file );
+  len = strlen( output_file );
   if( strcmp( output_file + len - 4, ".jp2" ) == 0 )
     {
     l_codec = opj_create_compress(OPJ_CODEC_JP2);