diff --git a/tests/compareRAWimages.c b/tests/compareRAWimages.c
index b4fa9427..d913cf9b 100644
--- a/tests/compareRAWimages.c
+++ b/tests/compareRAWimages.c
@@ -77,14 +77,14 @@ static int parse_cmdline_cmp(int argc, char **argv, test_cmp_parameters* param)
       {
     case 'b':
       sizemembasefile = strlen(opj_optarg)+1;
-      free(param->base_filename); // handle dup option
+      free(param->base_filename); /* handle dup option */
       param->base_filename = (char*) malloc(sizemembasefile);
       strcpy(param->base_filename, opj_optarg);
       /*printf("param->base_filename = %s [%d / %d]\n", param->base_filename, strlen(param->base_filename), sizemembasefile );*/
       break;
     case 't':
       sizememtestfile = strlen(opj_optarg) + 1;
-      free(param->test_filename); // handle dup option
+      free(param->test_filename); /* handle dup option */
       param->test_filename = (char*) malloc(sizememtestfile);
       strcpy(param->test_filename, opj_optarg);
       /*printf("param->test_filename = %s [%d / %d]\n", param->test_filename, strlen(param->test_filename), sizememtestfile);*/