diff --git a/userspace/libraries/LibC/include/sys/mman.h b/userspace/libraries/LibC/include/sys/mman.h
index 9c168fe0..c3cf4820 100644
--- a/userspace/libraries/LibC/include/sys/mman.h
+++ b/userspace/libraries/LibC/include/sys/mman.h
@@ -32,6 +32,12 @@ __BEGIN_DECLS
 #define POSIX_MADV_SEQUENTIAL	4
 #define POSIX_MADV_WILLNEED		5
 
+#define MADV_DONTNEED	POSIX_MADV_DONTNEED
+#define MADV_NORMAL		POSIX_MADV_NORMAL
+#define MADV_RANDOM		POSIX_MADV_RANDOM
+#define MADV_SEQUENTIAL	POSIX_MADV_SEQUENTIAL
+#define MADV_WILLNEED	POSIX_MADV_WILLNEED
+
 #define POSIX_TYPED_MEM_ALLOCATE		0x01
 #define POSIX_TYPED_MEM_ALLOCATE_CONTIG	0x02
 #define POSIX_TYPED_MEM_MAP_ALLOCATABLE	0x04
@@ -71,6 +77,8 @@ int		posix_typed_mem_open(const char* name, int oflag, int tflag);
 int		shm_open(const char* name, int oflag, mode_t mode);
 int		shm_unlink(const char* name);
 
+#define madvise posix_madvise
+
 __END_DECLS
 
 #endif
diff --git a/userspace/libraries/LibC/sys/mman.cpp b/userspace/libraries/LibC/sys/mman.cpp
index b53c8252..4dc38ae2 100644
--- a/userspace/libraries/LibC/sys/mman.cpp
+++ b/userspace/libraries/LibC/sys/mman.cpp
@@ -28,6 +28,14 @@ int msync(void* addr, size_t len, int flags)
 	return syscall(SYS_MSYNC, addr, len, flags);
 }
 
+int posix_madvise(void* addr, size_t len, int advice)
+{
+	(void)addr;
+	(void)len;
+	(void)advice;
+	fprintf(stddbg, "TODO: posix_madvise");
+	return 0;
+}
 
 #include <BAN/Assert.h>