diff --git a/core/syscall.h b/core/syscall.h
index 6ac00c4..40d6a8e 100644
--- a/core/syscall.h
+++ b/core/syscall.h
@@ -1,6 +1,6 @@
 #pragma once
 #ifdef __KERNEL__
-#include "cpu_context.h" 
+#include "cpu_context.h"
 #endif
 
 #define SYSCALL_ID_EXIT 1
@@ -8,7 +8,7 @@
 #define SYSCALL_ID_PUTC 3
 #define SYSCALL_ID_READ 4
 #define SYSCALL_ID_TEST 5
-#define SYSCALL_ID_BRK  6
+#define SYSCALL_ID_BRK 6
 #define SYSCALL_ID_MMAP 7
 
 #ifdef __KERNEL__
diff --git a/core/uaddrspace.h b/core/uaddrspace.h
index fa34190..9cf8cac 100644
--- a/core/uaddrspace.h
+++ b/core/uaddrspace.h
@@ -8,7 +8,9 @@ struct uAddrSpace;
 struct uAddrVirtualReg;
 
 #define UA_MAP_SHARED (1 << 0)
-#define UA_MAP_FIXED  (1 << 1)
+#define UA_MAP_PRIVATE (1 << 1)
+#define UA_MAP_FIXED (1 << 2)
+
 // TODO : move this struct to .c and add accessors
 struct uAddrVirtualReg {
     uaddr_t addr;
@@ -38,10 +40,9 @@ struct mappedRessource {
     int (*onResMapped)(struct uAddrVirtualReg *reg); // Callabck for when the ressourced get mapped
 };
 
-
-struct uAddrSpace * uAddrSpaceCreate(struct process *proc);
+struct uAddrSpace *uAddrSpaceCreate(struct process *proc);
 int uAddrSpaceDelete(struct uAddrSpace *addr);
-struct mmu_context * uAddrSpaceGetMMUContext(struct uAddrSpace *addr);
+struct mmu_context *uAddrSpaceGetMMUContext(struct uAddrSpace *addr);
 int uAddrSpaceSetHeap(struct uAddrSpace *as, uaddr_t addr, size_t size);
 int uAddrSpaceHeapCheckNAlloc(struct uAddrSpace *as, vaddr_t addr);
 uaddr_t sysBrk(struct uAddrSpace *as, uaddr_t newHeapTop);
diff --git a/userspace/libc.h b/userspace/libc.h
index 9ef9596..166e51c 100644
--- a/userspace/libc.h
+++ b/userspace/libc.h
@@ -36,10 +36,6 @@ int putc(const int c);
 int vsnprintf(char *str, size_t size, const char *format, va_list ap) __attribute__ ((__format__ (printf, 3, 0)));
 int vprintf(const char *format, va_list ap) __attribute__ ((__format__ (printf, 1, 0)));
 int printf(const char *format, ...) __attribute__ ((__format__ (printf, 1, 2)));
-/* To keep in sync with PAGING_MEM_* */
-#define PROT_EXEC  (1<<3)
-#define PROT_READ  (1<<1)
-#define PROT_WRITE (1<<2)
 void *mmap(void *addr, size_t len, int prot, int flags, char *path);
 
 int asprintf(char **strp, const char *fmt, ...) __attribute__ ((__format__ (printf, 2, 3)));
diff --git a/userspace/main_user.c b/userspace/main_user.c
index 9502c75..b45750c 100644
--- a/userspace/main_user.c
+++ b/userspace/main_user.c
@@ -1,5 +1,6 @@
 #include "libc.h"
 #include "stdarg.h"
+#include "sys/mman.h"
 #include "tiny.h"
 
 int func_help()
diff --git a/userspace/sys/mman.h b/userspace/sys/mman.h
new file mode 100644
index 0000000..c9c46cc
--- /dev/null
+++ b/userspace/sys/mman.h
@@ -0,0 +1,11 @@
+#pragma once
+
+/* To keep in sync with PAGING_MEM_* */
+#define PROT_EXEC  (1<<3)
+#define PROT_READ  (1<<1)
+#define PROT_WRITE (1<<2)
+
+#define MAP_SHARED (1 << 0)
+#define MAP_PRIVATE (1 << 1)
+#define MAP_FIXED (1 << 2)
+