diff --git a/include/asm-i386/mmu.h b/include/asm-i386/mmu.h
new file mode 100644
index 0000000..f431a0b
--- /dev/null
+++ b/include/asm-i386/mmu.h
@@ -0,0 +1,17 @@
+#ifndef __i386_MMU_H
+#define __i386_MMU_H
+
+#include <asm/semaphore.h>
+/*
+ * The i386 doesn't have a mmu context, but
+ * we put the segment information here.
+ *
+ * cpu_vm_mask is used to optimize ldt flushing.
+ */
+typedef struct { 
+	int size;
+	struct semaphore sem;
+	void *ldt;
+} mm_context_t;
+
+#endif