diff --git a/kernel/memory/pageframe.h b/kernel/memory/pageframe.h
index 04ba7d6..24e4cc0 100644
--- a/kernel/memory/pageframe.h
+++ b/kernel/memory/pageframe.h
@@ -1,5 +1,8 @@
+#ifndef _PAGEFRAME_H_
+#define _PAGEFRAME_H_
 class PageFrame {
     private:
     public:
         PageFrame();
 };
+#endif
diff --git a/kernel/memory/pageframealloc.cc b/kernel/memory/pageframealloc.cc
new file mode 100644
index 0000000..effcf6d
--- /dev/null
+++ b/kernel/memory/pageframealloc.cc
@@ -0,0 +1,19 @@
+#include "../memory/pageframealloc.h"
+#include <cstdint>
+#include "pageframe.h"
+
+void PageFrameAllocator::init(){
+}
+
+void PageFrameAllocator::stats(){
+}
+
+PageFrame* PageFrameAllocator::alloc(bool kernel){
+    return 0;
+}
+
+void PageFrameAllocator::free(PageFrame* frame){
+}
+
+void PageFrameAllocator::free(uintptr_t addr){
+}
diff --git a/kernel/memory/pageframealloc.h b/kernel/memory/pageframealloc.h
index 1473c52..1374ac1 100644
--- a/kernel/memory/pageframealloc.h
+++ b/kernel/memory/pageframealloc.h
@@ -1,3 +1,6 @@
+#ifndef _PAGEFRAMEALLOC_H_
+#define _PAGEFRAMEALLOC_H_
+
 #include <cstdint>
 
 #include "../memory/pageframe.h"
@@ -9,3 +12,4 @@ namespace PageFrameAllocator {
     void free (PageFrame *frame);
     void free (uintptr_t addr);
 }
+#endif