diff --git a/TODO b/TODO
index d34f9ad59..b5732e0aa 100644
--- a/TODO
+++ b/TODO
@@ -6,6 +6,9 @@ backends
 --------
   * Configuration problems:
     - add options "--exec-prefix=...." and "--prefix=..." compareable to gtk-config
+    - add warning when prefix dir is not listed in /etc/ld.so.conf on linux systems
+      may be there is a general way to test this if the destination library directory
+      is in the search path of the linker.
 
   * Add new backends (?)
     - Polaroid SprintScan 35 LE [should be included into microtek]