diff --git a/.gitignore b/.gitignore
index 0d4f5aa94fa9c3e85fe9e68b5debdfe14d8bbf18..d38177e1d801a3724ba76b82129756368c170005 100644
--- a/.gitignore
+++ b/.gitignore
@@ -55,6 +55,7 @@ CLASS_R2D_S
 # Google Tests
 GTest/RunTest
 GTest/gtest-all.o
+GTest/lib/libgtest.a
 
 # CLASS files
 DATA_BASES/DECAY/ALL/Decay.idx