diff --git a/tools/cooja/apps/mspsim/lib/.cvsignore b/tools/cooja/apps/mspsim/lib/.cvsignore
new file mode 100644
index 000000000..ba2da7816
--- /dev/null
+++ b/tools/cooja/apps/mspsim/lib/.cvsignore
@@ -0,0 +1,2 @@
+cooja_mspsim.jar
+mspsim.jar