diff --git a/demo/iso.c b/demo/iso.c
index f6f13b1..967a44d 100644
--- a/demo/iso.c
+++ b/demo/iso.c
@@ -39,6 +39,14 @@ void help()
     );
 }
 
+int callback(IsoFileSource *src)
+{
+    char *path = iso_file_source_get_path(src);
+    printf("CALLBACK: %s\n", path);
+    free(path);
+    return 1;
+}
+
 int main(int argc, char **argv)
 {
     int result;
@@ -145,6 +153,7 @@ int main(int argc, char **argv)
     iso_tree_set_ignore_hidden(image, 0);
     iso_tree_set_ignore_special(image, 0);
     iso_set_abort_severity("SORRY");
+    iso_tree_set_report_callback(image, callback);
     
     result = iso_tree_add_dir_rec(image, iso_image_get_root(image), argv[optind]);
     if (result < 0) {
diff --git a/src/libisofs.h b/src/libisofs.h
index efe8c97..8b36dc6 100644
--- a/src/libisofs.h
+++ b/src/libisofs.h
@@ -1540,6 +1540,22 @@ void iso_tree_set_ignore_special(IsoImage *image, int skip);
  */
 int iso_tree_get_ignore_special(IsoImage *image);
 
+/**
+ * Set a callback function that libisofs will call for each file that is
+ * added to the given image by a recursive addition function. This includes
+ * image import.
+ *  
+ * @param report
+ *      pointer to a function that will be called just before a file will be 
+ *      added to the image. You can control whether the file will be in fact 
+ *      added or ignored.
+ *      This function should return 1 to add the file, 0 to ignore it and 
+ *      continue, < 0 to abort the process
+ *      NULL is allowed if you don't want any callback.
+ */
+void iso_tree_set_report_callback(IsoImage *image, 
+                                 int (*report)(IsoFileSource *src));
+
 /**
  * Add a new node to the image tree, from an existing file. 
  * 
diff --git a/src/tree.c b/src/tree.c
index ddc08f9..9f4dec2 100644
--- a/src/tree.c
+++ b/src/tree.c
@@ -362,6 +362,25 @@ int iso_tree_get_ignore_special(IsoImage *image)
     return image->recOpts.ignore_special;
 }
 
+/**
+ * Set a callback function that libisofs will call for each file that is
+ * added to the given image by a recursive addition function. This includes
+ * image import.
+ *  
+ * @param report
+ *      pointer to a function that will be called just before a file will be 
+ *      added to the image. You can control whether the file will be in fact 
+ *      added or ignored.
+ *      This function should return 1 to add the file, 0 to ignore it and 
+ *      continue, < 0 to abort the process
+ *      NULL is allowed if you don't want any callback.
+ */
+void iso_tree_set_report_callback(IsoImage *image, 
+                                 int (*report)(IsoFileSource *src))
+{
+    image->recOpts.report = report;
+}
+
 static
 int iso_tree_add_node_builder(IsoImage *image, IsoDir *parent,
                               IsoFileSource *src, IsoNodeBuilder *builder,