diff --git a/src/bin/jp2/opj_dump.c b/src/bin/jp2/opj_dump.c
index ce384656..93b0f8d9 100644
--- a/src/bin/jp2/opj_dump.c
+++ b/src/bin/jp2/opj_dump.c
@@ -514,7 +514,7 @@ int main(int argc, char *argv[])
 
     /* Initialize reading of directory */
     if (img_fol.set_imgdir == 1) {
-        int it_image;
+        unsigned int it_image;
         num_images = get_num_images(img_fol.imgdirpath);
         if (num_images == 0) {
             fprintf(stdout, "Folder is empty\n");