diff --git a/serde/src/de/impls.rs b/serde/src/de/impls.rs
index 915b53a7..1fc88773 100644
--- a/serde/src/de/impls.rs
+++ b/serde/src/de/impls.rs
@@ -3361,3 +3361,13 @@ impl<'de> Visitor<'de> for FileOpenModeVisitor {
         }
     }
 }
+
+#[cfg(target_os = "mikros")]
+impl<'de> Deserialize<'de> for std::os::mikros::FileOpenMode {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        deserializer.deserialize_enum("FileOpenMode", &["Read", "Write", "ReadWrite"], FileOpenModeVisitor)
+    }
+}