diff --git a/libc/include/sys/mman.h b/libc/include/sys/mman.h
index 7c5f8d7..5a8c985 100644
--- a/libc/include/sys/mman.h
+++ b/libc/include/sys/mman.h
@@ -31,7 +31,6 @@
 #include <sys/cdefs.h>
 #include <sys/types.h>
 #include <asm/mman.h>
-#include <asm/page.h>
 
 __BEGIN_DECLS
 
@@ -44,23 +43,23 @@
 #define MREMAP_MAYMOVE  1
 #define MREMAP_FIXED    2
 
-extern void*  mmap(void *, size_t, int, int, int, off_t);
-extern void*  mmap64(void *, size_t, int, int, int, off64_t);
-extern int    munmap(void *, size_t);
-extern int    msync(const void *, size_t, int);
-extern int    mprotect(const void *, size_t, int);
-extern void*  mremap(void *, size_t, size_t, unsigned long);
+extern void* mmap(void*, size_t, int, int, int, off_t);
+extern void* mmap64(void*, size_t, int, int, int, off64_t);
+extern int munmap(void*, size_t);
+extern int msync(const void*, size_t, int);
+extern int mprotect(const void*, size_t, int);
+extern void* mremap(void*, size_t, size_t, unsigned long);
 
-extern int    mlockall(int);
-extern int    munlockall(void);
-extern int    mlock(const void *, size_t);
-extern int    munlock(const void *, size_t);
-extern int    madvise(const void *, size_t, int);
+extern int mlockall(int);
+extern int munlockall(void);
+extern int mlock(const void*, size_t);
+extern int munlock(const void*, size_t);
+extern int madvise(const void*, size_t, int);
 
-extern int    mlock(const void *addr, size_t len);
-extern int    munlock(const void *addr, size_t len);
+extern int mlock(const void*, size_t);
+extern int munlock(const void*, size_t);
 
-extern int    mincore(void*  start, size_t  length, unsigned char*  vec);
+extern int mincore(void*, size_t, unsigned char*);
 
 __END_DECLS
 
diff --git a/libc/include/sys/user.h b/libc/include/sys/user.h
index 90cce80..e16b1a5 100644
--- a/libc/include/sys/user.h
+++ b/libc/include/sys/user.h
@@ -30,6 +30,7 @@
 #define _SYS_USER_H_
 
 #include <sys/cdefs.h>
+#include <limits.h> /* For PAGE_SIZE. */
 
 __BEGIN_DECLS