diff --git a/trick_sims/.gitignore b/trick_sims/.gitignore
index 4a06bade..1e6c99f9 100644
--- a/trick_sims/.gitignore
+++ b/trick_sims/.gitignore
@@ -31,3 +31,4 @@ T_main_*
 **/graphics/cpp/build
 jitlib
 build
+*.class