diff --git a/.gitignore b/.gitignore
index 7fc4f731c..bcadab8ef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,8 @@ Config/bin/
 Config/obj/
 DeviceTest/bin/
 DeviceTest/obj/
+Dirichlet.Numerics/bin
+Dirichlet.Numerics/obj
 Results/bin/
 Results/obj/
 ResultsBrowser/bin/
diff --git a/clean.bat b/clean.bat
index 4a15536ba..377d75378 100644
--- a/clean.bat
+++ b/clean.bat
@@ -2,6 +2,8 @@ rmdir /s /q Config\bin
 rmdir /s /q Config\obj
 rmdir /s /q DeviceTest\bin
 rmdir /s /q DeviceTest\obj
+rmdir /s /q Dirichlet.Numerics\bin
+rmdir /s /q Dirichlet.Numerics\obj
 rmdir /s /q Results\bin
 rmdir /s /q Results\obj
 rmdir /s /q ResultsBrowser\bin