diff --git a/Contributing.md b/Contributing.md
index 71d7dc3a2..ab1e73508 100644
--- a/Contributing.md
+++ b/Contributing.md
@@ -163,6 +163,13 @@ The only exception to the above are actions that are exclusive to the github act
 
 * the printf family of function does not completely implement all printf modifiers and does not behave as expected in some cases - all this should be documented in detail
 
+## Floating point support
+
+The first step is implementing the datatype "float" as IEEE488 floats. Help welcomed!
+
+* WIP compiler/library changes are here: https://github.com/cc65/cc65/pull/1777
+* free software library with testbench is here: http://www.jhauser.us/arithmetic/
+
 ## Test suite
 
 * specific tests to check the optimizer (rather than the codegenerator) are needed.