diff --git a/include/zephyr/posix/stropts.h b/include/zephyr/posix/stropts.h
index 9474c36edb..de24435eef 100644
--- a/include/zephyr/posix/stropts.h
+++ b/include/zephyr/posix/stropts.h
@@ -18,6 +18,8 @@ struct strbuf {
 };
 
 int putmsg(int fildes, const struct strbuf *ctlptr, const struct strbuf *dataptr, int flags);
+int fdetach(const char *path);
+int fattach(int fildes, const char *path);
 
 #ifdef __cplusplus
 }
diff --git a/lib/posix/options/stropts.c b/lib/posix/options/stropts.c
index 54fca00cc9..9db1a790a4 100644
--- a/lib/posix/options/stropts.c
+++ b/lib/posix/options/stropts.c
@@ -18,3 +18,20 @@ int putmsg(int fildes, const struct strbuf *ctlptr, const struct strbuf *dataptr
 	errno = ENOSYS;
 	return -1;
 }
+
+int fdetach(const char *path)
+{
+	ARG_UNUSED(path);
+
+	errno = ENOSYS;
+	return -1;
+}
+
+int fattach(int fildes, const char *path)
+{
+	ARG_UNUSED(fildes);
+	ARG_UNUSED(path);
+
+	errno = ENOSYS;
+	return -1;
+}