diff --git a/src/Makefile.am b/src/Makefile.am
index 1832fa8..f602e69 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -7,6 +7,8 @@ quark_kernel_LDFLAGS = -nostdlib
 if x86
 quark_kernel_SOURCES += x86/mmgr.c \
                         x86/putc.c \
+                        x86/multiboot2.c \
+                        x86/isr.c \
                         x86/quark_x86.c \
                         x86/entry.S 
 quark_kernel_LDFLAGS += -T x86/linker.ld