diff --git a/userspace/libraries/LibC/CMakeLists.txt b/userspace/libraries/LibC/CMakeLists.txt
index 33692905..b292010f 100644
--- a/userspace/libraries/LibC/CMakeLists.txt
+++ b/userspace/libraries/LibC/CMakeLists.txt
@@ -49,6 +49,7 @@ set(LIBC_SOURCES
 	sys/mman.cpp
 	sys/resource.cpp
 	sys/select.cpp
+	sys/shm.cpp
 	sys/socket.cpp
 	sys/stat.cpp
 	sys/statvfs.cpp
diff --git a/userspace/libraries/LibC/include/sys/shm.h b/userspace/libraries/LibC/include/sys/shm.h
index 1ec705a8..eedc112a 100644
--- a/userspace/libraries/LibC/include/sys/shm.h
+++ b/userspace/libraries/LibC/include/sys/shm.h
@@ -14,9 +14,12 @@ __BEGIN_DECLS
 
 #include <sys/ipc.h>
 
-#define SHM_RDONLY	0x01
-#define SHM_RDONLY	0x02
-#define SHM_RDONLY	0x04
+#include <unistd.h>
+
+#define SHM_RDONLY 0x01
+#define SHM_RND    0x02
+
+#define SHMLBA (sysconf(_SC_PAGE_SIZE))
 
 typedef unsigned int shmatt_t;
 
diff --git a/userspace/libraries/LibC/sys/shm.cpp b/userspace/libraries/LibC/sys/shm.cpp
new file mode 100644
index 00000000..ea07066d
--- /dev/null
+++ b/userspace/libraries/LibC/sys/shm.cpp
@@ -0,0 +1,11 @@
+#include <BAN/Debug.h>
+
+#include <errno.h>
+#include <sys/shm.h>
+
+#define TODO_FUNC(type, name, ...) type name(__VA_ARGS__) { dwarnln("TODO: " #name); errno = ENOTSUP; return (type)-1; }
+
+TODO_FUNC(void*, shmat, int, const void*, int)
+TODO_FUNC(int,   shmctl, int, int, struct shmid_ds*)
+TODO_FUNC(int,   shmdt, const void*)
+TODO_FUNC(int,   shmget, key_t, size_t, int)