diff --git a/kernel/Makefile b/kernel/Makefile
index ebed889..ae478a0 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -32,6 +32,7 @@ format:
 		':!uACPI/include/**' \
 		':!uACPI/tests/**' \
 		':!libk/printf*' \
-		':!lz4/lz4*')
+		':!lz4/lz4*' \
+		':!device/pci_defs.c')
 
 .PHONY: all clean format