diff --git a/.gitignore b/.gitignore
index 570fbf81029442ab30ef3f4c6e691fa04146efd7..8101f080f272a845eb7cc6cf9b6447d0f17cf469 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,3 +24,4 @@ libhammer.pc
 .sconsign.dblite
 *.os
 *.pyc
+*.gem