diff --git a/debug/main.asm b/debug/main.asm
index 45ca7df..5ca7610 100644
--- a/debug/main.asm
+++ b/debug/main.asm
@@ -201,6 +201,6 @@ isr_debug:
   pop ss
   iret
 
-%include "printf.inc"
+%include "printf.asm"
 
 align 512
diff --git a/lib/printf.inc b/lib/printf.asm
similarity index 100%
rename from lib/printf.inc
rename to lib/printf.asm