diff --git a/arch/sh/src/__unmapself.c b/arch/sh/src/__unmapself.c
new file mode 100644
index 00000000..4df9e7bf
--- /dev/null
+++ b/arch/sh/src/__unmapself.c
@@ -0,0 +1,19 @@
+#include "pthread_impl.h"
+
+void __unmapself_sh_mmu(void *, size_t);
+void __unmapself_sh_nommu(void *, size_t);
+
+#if !defined(__SH3__) && !defined(__SH4__)
+#define __unmapself __unmapself_sh_nommu
+#include "../../../src/thread/__unmapself.c"
+#undef __unmapself
+extern __attribute__((__visibility__("hidden"))) unsigned __sh_nommu;
+#else
+#define __sh_nommu 0
+#endif
+
+void __unmapself(void *base, size_t size)
+{
+	if (__sh_nommu) __unmapself_sh_nommu(base, size);
+	else __unmapself_sh_mmu(base, size);
+}
diff --git a/src/thread/sh/__unmapself.s b/src/thread/sh/__unmapself.s
index b34c3c80..cad91bf6 100644
--- a/src/thread/sh/__unmapself.s
+++ b/src/thread/sh/__unmapself.s
@@ -1,7 +1,7 @@
 .text
-.global __unmapself
-.type   __unmapself, @function
-__unmapself:
+.global __unmapself_sh_mmu
+.type   __unmapself_sh_mmu, @function
+__unmapself_sh_mmu:
 	mov   #91, r3  ! SYS_munmap
 	trapa #18