diff --git a/container/fhs/abs.go b/container/fhs/abs.go
index 9175c1f..dfd3c04 100644
--- a/container/fhs/abs.go
+++ b/container/fhs/abs.go
@@ -36,6 +36,8 @@ var (
 
 	// AbsDev is [Dev] as [check.Absolute].
 	AbsDev = unsafeAbs(Dev)
+	// AbsDevShm is [DevShm] as [check.Absolute].
+	AbsDevShm = unsafeAbs(DevShm)
 	// AbsProc is [Proc] as [check.Absolute].
 	AbsProc = unsafeAbs(Proc)
 	// AbsSys is [Sys] as [check.Absolute].
diff --git a/container/fhs/fhs.go b/container/fhs/fhs.go
index 6a3a304..7e0d36c 100644
--- a/container/fhs/fhs.go
+++ b/container/fhs/fhs.go
@@ -29,6 +29,8 @@ const (
 
 	// Dev points to the root directory for device nodes.
 	Dev = "/dev/"
+	// DevShm is the place for POSIX shared memory segments, as created via shm_open(3).
+	DevShm = "/dev/shm/"
 	// Proc points to a virtual kernel file system exposing the process list and other functionality.
 	Proc = "/proc/"
 	// ProcSys points to a hierarchy below /proc/ that exposes a number of kernel tunables.
diff --git a/internal/outcome/main_test.go b/internal/outcome/main_test.go
index ecc4ccc..de2113f 100644
--- a/internal/outcome/main_test.go
+++ b/internal/outcome/main_test.go
@@ -141,7 +141,7 @@ func TestOutcomeMain(t *testing.T) {
 				Proc(fhs.AbsProc).
 				Tmpfs(hst.AbsPrivateTmp, 1<<12, 0755).
 				Bind(fhs.AbsDev, fhs.AbsDev, std.BindWritable|std.BindDevice).
-				Tmpfs(fhs.AbsDev.Append("shm"), 0, 01777).
+				Tmpfs(fhs.AbsDevShm, 0, 01777).
 
 				// spRuntimeOp
 				Tmpfs(fhs.AbsRunUser, 1<<12, 0755).
@@ -243,7 +243,7 @@ func TestOutcomeMain(t *testing.T) {
 				Proc(m("/proc/")).
 				Tmpfs(hst.AbsPrivateTmp, 4096, 0755).
 				DevWritable(m("/dev/"), true).
-				Tmpfs(m("/dev/shm"), 0, 01777).
+				Tmpfs(m("/dev/shm/"), 0, 01777).
 				Tmpfs(m("/run/user/"), 4096, 0755).
 				Bind(m("/tmp/hakurei.0/runtime/0"), m("/run/user/65534"), std.BindWritable).
 				Bind(m("/tmp/hakurei.0/tmpdir/0"), m("/tmp/"), std.BindWritable).
@@ -412,7 +412,7 @@ func TestOutcomeMain(t *testing.T) {
 				Proc(m("/proc/")).
 				Tmpfs(hst.AbsPrivateTmp, 4096, 0755).
 				DevWritable(m("/dev/"), true).
-				Tmpfs(m("/dev/shm"), 0, 01777).
+				Tmpfs(m("/dev/shm/"), 0, 01777).
 				Tmpfs(m("/run/user/"), 4096, 0755).
 				Bind(m("/tmp/hakurei.0/runtime/9"), m("/run/user/65534"), std.BindWritable).
 				Bind(m("/tmp/hakurei.0/tmpdir/9"), m("/tmp/"), std.BindWritable).
@@ -558,7 +558,7 @@ func TestOutcomeMain(t *testing.T) {
 				Proc(m("/proc/")).
 				Tmpfs(hst.AbsPrivateTmp, 4096, 0755).
 				DevWritable(m("/dev/"), true).
-				Tmpfs(m("/dev/shm"), 0, 01777).
+				Tmpfs(m("/dev/shm/"), 0, 01777).
 				Tmpfs(m("/run/user/"), 4096, 0755).
 				Bind(m("/tmp/hakurei.0/runtime/1"), m("/run/user/1971"), std.BindWritable).
 				Bind(m("/tmp/hakurei.0/tmpdir/1"), m("/tmp/"), std.BindWritable).
diff --git a/internal/outcome/shim_test.go b/internal/outcome/shim_test.go
index c18e1f9..147607f 100644
--- a/internal/outcome/shim_test.go
+++ b/internal/outcome/shim_test.go
@@ -66,7 +66,7 @@ func TestShimEntrypoint(t *testing.T) {
 			Proc(fhs.AbsProc).
 			Tmpfs(hst.AbsPrivateTmp, 1<<12, 0755).
 			Bind(fhs.AbsDev, fhs.AbsDev, std.BindWritable|std.BindDevice).
-			Tmpfs(fhs.AbsDev.Append("shm"), 0, 01777).
+			Tmpfs(fhs.AbsDevShm, 0, 01777).
 
 			// spRuntimeOp
 			Tmpfs(fhs.AbsRunUser, 1<<12, 0755).
diff --git a/internal/outcome/spcontainer.go b/internal/outcome/spcontainer.go
index a6eed75..738d338 100644
--- a/internal/outcome/spcontainer.go
+++ b/internal/outcome/spcontainer.go
@@ -116,7 +116,7 @@ func (s *spParamsOp) toContainer(state *outcomeStateParams) error {
 		state.params.Bind(fhs.AbsDev, fhs.AbsDev, std.BindWritable|std.BindDevice)
 	}
 	// /dev is mounted readonly later on, this prevents /dev/shm from going readonly with it
-	state.params.Tmpfs(fhs.AbsDev.Append("shm"), 0, 01777)
+	state.params.Tmpfs(fhs.AbsDevShm, 0, 01777)
 
 	return nil
 }
diff --git a/internal/outcome/spcontainer_test.go b/internal/outcome/spcontainer_test.go
index 0334ac0..d6999b9 100644
--- a/internal/outcome/spcontainer_test.go
+++ b/internal/outcome/spcontainer_test.go
@@ -72,7 +72,7 @@ func TestSpParamsOp(t *testing.T) {
 				Root(m("/var/lib/hakurei/base/org.debian"), std.BindWritable).
 				Proc(fhs.AbsProc).Tmpfs(hst.AbsPrivateTmp, 1<<12, 0755).
 				DevWritable(fhs.AbsDev, true).
-				Tmpfs(fhs.AbsDev.Append("shm"), 0, 01777),
+				Tmpfs(fhs.AbsDevShm, 0, 01777),
 		}, paramsWantEnv(config, map[string]string{
 			"TERM": "xterm",
 		}, func(t *testing.T, state *outcomeStateParams) {
@@ -110,7 +110,7 @@ func TestSpParamsOp(t *testing.T) {
 				Root(m("/var/lib/hakurei/base/org.debian"), std.BindWritable).
 				Proc(fhs.AbsProc).Tmpfs(hst.AbsPrivateTmp, 1<<12, 0755).
 				Bind(fhs.AbsDev, fhs.AbsDev, std.BindWritable|std.BindDevice).
-				Tmpfs(fhs.AbsDev.Append("shm"), 0, 01777),
+				Tmpfs(fhs.AbsDevShm, 0, 01777),
 		}, paramsWantEnv(config, map[string]string{
 			"TERM": "xterm",
 		}, func(t *testing.T, state *outcomeStateParams) {