diff --git a/.gitignore b/.gitignore
index 9af0a0bd4..a4639d0ca 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,6 +37,7 @@ pokecrystal.txt
 *.dimensions
 *.gbcpal
 *.2bpp
+*.1bpp
 *.lz
 *.pal
 *.animated.tilemap