diff --git a/sortix/Makefile b/sortix/Makefile
index 6b6bd551..83e58638 100644
--- a/sortix/Makefile
+++ b/sortix/Makefile
@@ -68,6 +68,7 @@ vga.o \
 elf.o \
 process.o \
 initrd.o \
+thread.o \
 ../libmaxsi/libmaxsi-sortix.a
 
 JSOBJS:=$(subst .o,-js.o,$(OBJS))
diff --git a/sortix/kernel.cpp b/sortix/kernel.cpp
index e81412a0..dd878d28 100644
--- a/sortix/kernel.cpp
+++ b/sortix/kernel.cpp
@@ -33,7 +33,7 @@
 #include "keyboard.h"
 #include "multiboot.h"
 #include "memorymanagement.h"
-#include "thread.cpp"
+#include "thread.h"
 #include "process.h"
 #include "scheduler.h"
 #include "syscall.h"
diff --git a/utils/init.cpp b/utils/init.cpp
index 4d012f53..96c942e4 100644
--- a/utils/init.cpp
+++ b/utils/init.cpp
@@ -2,7 +2,7 @@
 #include <sys/wait.h>
 #include <libmaxsi/platform.h>
 #include <libmaxsi/process.h>
-#include <libmaxsi/thread.cpp>
+#include <libmaxsi/thread.h>
 
 using namespace Maxsi;