diff --git a/Makefile b/Makefile
index 3d0f04c..78d922a 100644
--- a/Makefile
+++ b/Makefile
@@ -45,3 +45,6 @@ $(BUILD_DIR)/$(ISO_NAME): $(BUILD_DIR)/$(K_BIN_NAME) grub.cfg
 	cp grub.cfg $(BUILD_DIR)/iso/boot/grub
 	cp $(BUILD_DIR)/$(K_BIN_NAME) $(BUILD_DIR)/iso/boot
 	grub-mkrescue -o $(BUILD_DIR)/$(ISO_NAME) $(BUILD_DIR)/iso
+
+run:
+	qemu-system-x86_64 $(BUILD_DIR)/$(ISO_NAME) -serial stdio
diff --git a/src/arch/amd64/shim.c b/src/arch/amd64/shim.c
index 8a9d146..1e73525 100644
--- a/src/arch/amd64/shim.c
+++ b/src/arch/amd64/shim.c
@@ -1,23 +1,15 @@
 #include <stdint.h>
 #include <cpuid.h>
 
-#define PG_PRESENT          0x0000'0000'0000'0001
-#define PG_READ_WRITE       0x0000'0000'0000'0002
-#define PG_USER_SUPERVISE   0x0000'0000'0000'0004
-#define PG_WRITE_THROUGH    0x0000'0000'0000'0008
-#define PG_CACHE_DISABLE    0x0000'0000'0000'0010
-#define PG_ACCESSED         0x0000'0000'0000'0020
-#define PG_EXECUTE_DISABLE  0x8000'0000'0000'0000
-
-#define F_PRESENT      0b1
-#define F_WRITEABLE    0b10
-#define F_UNPRIVILEGED 0b100
-#define F_WRITETHROUGH 0b1000
-#define F_CACHEDISABLE 0b10000
-#define F_ACCESSED     0b100000
-#define F_DIRTY        0b1000000
-#define F_MEGABYTE     0b10000000
-#define F_GLOBAL       0b100000000
+#define F_PRESENT      0x001
+#define F_WRITEABLE    0x002
+#define F_UNPRIVILEGED 0x004
+#define F_WRITETHROUGH 0x008
+#define F_CACHEDISABLE 0x010 
+#define F_ACCESSED     0x020
+#define F_DIRTY        0x040
+#define F_MEGABYTE     0x080
+#define F_GLOBAL       0x100
 
 // PAGE MAP LEVEL 4 ENTRY
 struct pml4e {