diff --git a/CREDITS.txt b/CREDITS.txt
index e77c0266f..19cc3b980 100644
--- a/CREDITS.txt
+++ b/CREDITS.txt
@@ -2136,3 +2136,4 @@ Jan-Hinrich Klee
 Hans-Reinhard Mette
 Alejandro Casals Oliver
 David Homewood
+John Dunning