diff --git a/src/Makefile b/src/Makefile
index 511afef..6ce6c27 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -8,7 +8,8 @@
 			interrupts.o \
 			log.o \
 			irq.o \
-			pic.o
+			pic.o \
+			timer.o
 CFLAGS = -nostdlib -nostdinc -fno-builtin -fno-stack-protector -ffreestanding -m32 -O2 -g
 LDFLAGS = -Tlink.ld -melf_i386
 ASMFLAGS = -felf