diff --git a/.gitignore b/.gitignore
index 625b7c3..3aeb60b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
+# Ignore CSV files opened with LibreOffice Calc
+.~lock.*
+
 # ---> C++
 # Prerequisites
 *.d