diff --git a/.gitignore b/.gitignore
index 3b0e87f1781c450b737f9e81d4259e871eb6d4a4..7ba4584af0a904fa07d3b3d60a4aa5550220ba7f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,6 +21,7 @@ utils/makemod
 utils/makewave
 utils/mat2su
 utils/syn2d
+utils/green3D
 fdelmodc/fdelmodc
 include/genfft.h
 Make_include