diff --git a/.gitignore b/.gitignore
index db195538d28e083dbf990559b00ae266e58ac20c..48b72c7ff81db7abd661b05f1d720b864b4ec867 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,3 +21,4 @@
 /specifications/RPR*.xml
 /specifications/SISO*.xml
 /specifications/archive
+/assignments/nbproject/build-impl.xml~