diff --git a/espflash/src/cli/serial.rs b/espflash/src/cli/serial.rs
index a9ecc610..0fdb8a6d 100644
--- a/espflash/src/cli/serial.rs
+++ b/espflash/src/cli/serial.rs
@@ -19,12 +19,21 @@ pub fn get_serial_port_info(
     // select a serial port. If some VID and PID were provided then the user will
     // also be prompted to select a port, unless there is only one found and its VID
     // and PID match the configured values.
+    //
+    // The call to canonicalize() was originally added to resolve https://github.com/esp-rs/espflash/issues/177,
+    // however, canonicalize  doesn't work (on Windows) with "dummy" device paths like `COM4`.
+    // That's the reason we need to handle Windows/Posix differently.
+
     let ports = detect_usb_serial_ports().unwrap_or_default();
 
     if let Some(serial) = &matches.serial {
-        find_serial_port(&ports, &std::fs::canonicalize(serial)?.to_string_lossy())
+        #[cfg(not(target_os = "windows"))]
+        let serial = std::fs::canonicalize(serial)?.to_string_lossy().to_string();
+        find_serial_port(&ports, &serial)
     } else if let Some(serial) = &config.connection.serial {
-        find_serial_port(&ports, &std::fs::canonicalize(serial)?.to_string_lossy())
+        #[cfg(not(target_os = "windows"))]
+        let serial = std::fs::canonicalize(serial)?.to_string_lossy().to_string();
+        find_serial_port(&ports, &serial)
     } else {
         let (port, matches) = select_serial_port(ports, config)?;
 
diff --git a/espflash/src/partition_table.rs b/espflash/src/partition_table.rs
index 952c98da..d0d82d1c 100644
--- a/espflash/src/partition_table.rs
+++ b/espflash/src/partition_table.rs
@@ -29,7 +29,7 @@ const MD5_PART_MAGIC_BYTES: &[u8] = &[
 ];
 const END_MARKER: [u8; 32] = [0xFF; 32];
 
-#[derive(Copy, Clone, Debug, Deserialize, Serialize, PartialEq, BinRead)]
+#[derive(Copy, Clone, Debug, Deserialize, Serialize, PartialEq, Eq, BinRead)]
 #[repr(u8)]
 #[br(little, repr = u8)]
 #[serde(rename_all = "lowercase")]
@@ -62,7 +62,7 @@ impl Display for Type {
     }
 }
 
-#[derive(Copy, Clone, Debug, Deserialize, Serialize, PartialEq, BinRead)]
+#[derive(Copy, Clone, Debug, Deserialize, Serialize, PartialEq, Eq, BinRead)]
 #[repr(u8)]
 #[br(little, repr = u8)]
 pub enum AppType {
@@ -104,7 +104,7 @@ pub enum AppType {
     Test = 0x20,
 }
 
-#[derive(Copy, Clone, Debug, Deserialize, EnumIter, Serialize, PartialEq, BinRead)]
+#[derive(Copy, Clone, Debug, Deserialize, EnumIter, Serialize, PartialEq, Eq, BinRead)]
 #[repr(u8)]
 #[br(little, repr = u8)]
 #[serde(rename_all = "lowercase")]
@@ -127,7 +127,7 @@ impl DataType {
     }
 }
 
-#[derive(Debug, Serialize, Deserialize, PartialEq, Copy, Clone, BinRead)]
+#[derive(Debug, Serialize, Deserialize, PartialEq, Eq, Copy, Clone, BinRead)]
 #[serde(untagged)]
 pub enum SubType {
     App(AppType),
@@ -162,7 +162,7 @@ impl SubType {
     }
 }
 
-#[derive(Copy, Clone, Debug, Deserialize, Serialize, PartialEq, BinRead)]
+#[derive(Copy, Clone, Debug, Deserialize, Serialize, PartialEq, Eq, BinRead)]
 #[repr(u8)]
 #[br(little, repr = u8)]
 #[serde(rename_all = "lowercase")]