diff --git a/libsrc/format/im_mat2vips.c b/libsrc/format/im_mat2vips.c
index 5e4f2076..ca4dccf3 100644
--- a/libsrc/format/im_mat2vips.c
+++ b/libsrc/format/im_mat2vips.c
@@ -27,6 +27,19 @@
 
  */
 
+/*
+
+	Remaining issues:
+
+* it transposes images, I think, since Matlab seems to use column-major order
+* will colour images work? no idea, needs testing
+* it will not do complex images
+* it will not handle sparse matricies
+* it loads the first variable in the file with between 1 and 3 dimensions, is this sensible behaviour?
+* load only, no save
+
+ */
+
 /*
 #define DEBUG
  */