--- a/libcomposefs/lcfs-mount.c
+++ b/libcomposefs/lcfs-mount.c
@@ -157,7 +157,7 @@ static void escape_mount_option_to(const char
*str, char *dest)

        d = dest + strlen(dest);
        for (s = str; *s != 0; s++) {
-               if (*s == ',')
+               if (*s == ',' || *s == '\\')
                        *d++ = '\\';
                *d++ = *s;
        }
@@ -171,7 +171,7 @@ static char *escape_mount_option(const char *str)
        int n_escapes = 0;

        for (s = str; *s != 0; s++) {
-               if (*s == ',')
+               if (*s == ',' || *s == '\\')
                        n_escapes++;
        }