diff --git a/src/image_reader/free_functions.rs b/src/image_reader/free_functions.rs
index bf4a3d2341..7e32159a9d 100644
--- a/src/image_reader/free_functions.rs
+++ b/src/image_reader/free_functions.rs
@@ -124,7 +124,7 @@ pub(crate) fn write_buffer_impl<W: std::io::Write + Seek>(
     }
 }
 
-static MAGIC_BYTES: [(&[u8], ImageFormat); 24] = [
+static MAGIC_BYTES: [(&[u8], ImageFormat); 25] = [
     (b"\x89PNG\r\n\x1a\n", ImageFormat::Png),
     (&[0xff, 0xd8, 0xff], ImageFormat::Jpeg),
     (b"GIF89a", ImageFormat::Gif),
@@ -148,7 +148,8 @@ static MAGIC_BYTES: [(&[u8], ImageFormat); 24] = [
     (b"\0\0\0\x1cftypavif", ImageFormat::Avif),
     (&[0x76, 0x2f, 0x31, 0x01], ImageFormat::OpenExr), // = &exr::meta::magic_number::BYTES
     (b"qoif", ImageFormat::Qoi),
-    (&[0x0A], ImageFormat::Pcx),
+    (&[0x0a, 0x02], ImageFormat::Pcx),
+    (&[0x0a, 0x05], ImageFormat::Pcx),
 ];
 
 /// Guess image format from memory block