diff --git a/apps/MixMaster/.cvsignore b/apps/MixMaster/.cvsignore
index 5d0bfe229..faac25bb1 100644
--- a/apps/MixMaster/.cvsignore
+++ b/apps/MixMaster/.cvsignore
@@ -1 +1,2 @@
 error.txt
+*.pyc
diff --git a/apps/MixMaster/Units/.cvsignore b/apps/MixMaster/Units/.cvsignore
new file mode 100644
index 000000000..0d20b6487
--- /dev/null
+++ b/apps/MixMaster/Units/.cvsignore
@@ -0,0 +1 @@
+*.pyc