diff --git a/hardware/schematics/.gitignore b/hardware/schematics/.gitignore
index 9a68961..ed97cbf 100644
--- a/hardware/schematics/.gitignore
+++ b/hardware/schematics/.gitignore
@@ -1,2 +1,3 @@
 **/gerber_output
 **/Glycol_Chiller-backups
+*.kicad_pcb-bak