diff --git a/source/durandal/text.rs b/source/durandal/text.rs
index c97f15e..57c224e 100644
--- a/source/durandal/text.rs
+++ b/source/durandal/text.rs
@@ -153,7 +153,7 @@ fn mac_roman_conv_basic_marathon_stuff()
 #[test]
 fn mac_roman_cstr_tests()
 {
-   assert_eq!(mac_roman_cstr(b"I\xd5ve awaken\0e").unwrap(), "I’ve awaken");
+   assert_eq!(mac_roman_cstr(b"I\xd5ve awaken\0ed").unwrap(), "I’ve awaken");
 }
 
 // EOF
diff --git a/source/marathon/map.rs b/source/marathon/map.rs
index 13235a1..f723d81 100644
--- a/source/marathon/map.rs
+++ b/source/marathon/map.rs
@@ -67,8 +67,33 @@ pub fn read_minf(b: &[u8]) -> ResultS<Minf>
            level_name})
 }
 
+/// Reads an old `Minf` chunk.
+pub fn read_old_minf(b: &[u8]) -> ResultS<Minf>
+{
+   let minf = read_minf(b)?;
+
+   let mut entry_flags = if minf.entry_flags.is_empty() {
+      EntFlags::Solo
+   } else {
+      minf.entry_flags
+   };
+
+   if entry_flags.intersects(EntFlags::Solo | EntFlags::Carnage) {
+      entry_flags.insert(EntFlags::CoOp)
+   }
+
+   Ok(Minf{entry_flags, ..minf})
+}
+
 /// Reads an `iidx` chunk.
-pub fn read_iidx(b: &[u8]) -> ResultS<(u16, usize)> {Ok((u16b(b), 2))}
+pub fn read_iidx(b: &[u8]) -> ResultS<(u16, usize)>
+{
+   if b.len() < 2 {
+      bail!("not enough data");
+   }
+
+   Ok((u16b(b), 2))
+}
 
 /// Reads an `EPNT` chunk.
 pub fn read_epnt(b: &[u8]) -> ResultS<(Point, usize)>
diff --git a/source/marathon/wad.rs b/source/marathon/wad.rs
index b9c4206..da67790 100644
--- a/source/marathon/wad.rs
+++ b/source/marathon/wad.rs
@@ -11,6 +11,7 @@ pub fn read_chunks(b: &[u8], old_dat: bool, siz_cnk: usize)
    let mut chunks = Vec::new();
    let mut p = 0;
 
+   let map_read_minfo = if old_dat {map::read_old_minf} else {map::read_minf};
    let map_read_sides = if old_dat {map::read_old_sids} else {map::read_sids};
    let map_read_polys = if old_dat {map::read_old_poly} else {map::read_poly};
    let map_read_light = if old_dat {map::read_old_lite} else {map::read_lite};
@@ -28,7 +29,7 @@ pub fn read_chunks(b: &[u8], old_dat: bool, siz_cnk: usize)
 
       chunks.push(match &iden.0 {
          b"PICT" => Chunk::Pict(pict::load_pict(data)?),
-         b"Minf" => Chunk::Minf(map::read_minf(data)?),
+         b"Minf" => Chunk::Minf(map_read_minfo(data)?),
          b"iidx" => Chunk::Iidx(rd_array(data, map::read_iidx)?),
          b"EPNT" => Chunk::Pnts(rd_array(data, map::read_epnt)?),
          b"PNTS" => Chunk::Pnts(rd_array(data, map::read_pnts)?),