diff --git a/boot/Makefrag b/boot/Makefrag
index ad5d941..197dc37 100644
--- a/boot/Makefrag
+++ b/boot/Makefrag
@@ -3,14 +3,14 @@ OBJDIRS 	+= boot
 $(OBJDIR)/boot/mbr.bin: boot/mbr/mbr.asm
 	@echo + as bin $<
 	@mkdir -p $(@D)
-	@$(AS) -I ./boot/mbr/include -o $@ $<
+	@$(AS) -I ./boot/mbr/include/ -o $@ $<
 
 $(OBJDIR)/boot/boot.bin: boot/mbr/boot.asm
 	@echo + as bin $<
 	@mkdir -p $(@D)
-	@$(AS) -I ./boot/mbr/include -o $@ $<
+	@$(AS) -I ./boot/mbr/include/ -o $@ $<
 
 $(OBJDIR)/boot/loader.bin: boot/mbr/loader.asm
 	@echo + as bin $<
 	@mkdir -p $(@D)
-	@$(AS) -I ./boot/mbr/include -o $@ $<
\ No newline at end of file
+	@$(AS) -I ./boot/mbr/include/ -o $@ $<
\ No newline at end of file