diff --git a/examples/sdl/Cargo.toml b/examples/sdl/Cargo.toml
index 203f0936cfaf7a2d99af449a7926c8b7a245e240..6a029adafa561be3e8c6030827a2f0e05e01886f 100644
--- a/examples/sdl/Cargo.toml
+++ b/examples/sdl/Cargo.toml
@@ -9,6 +9,7 @@ edition = "2018"
 
 [dependencies.boytacean]
 path = "../.."
+features = ["debug"]
 
 [dependencies.sdl2]
 version = "0.35"
diff --git a/src/rom.rs b/src/rom.rs
index be0f084c25ea7b0fcd6b812dcf3d6fbbdea0951d..ef4ab2aff0a335d054c305a25f70caaca23b8054 100644
--- a/src/rom.rs
+++ b/src/rom.rs
@@ -284,6 +284,13 @@ pub static MBC1: Mbc = Mbc {
                 }
                 rom.set_rom_bank(rom_bank);
             }
+            0x6000 | 0x7000 => {
+                let mut rom_bank = value & 0x1f;
+                if rom_bank == 0 {
+                    rom_bank = 1;
+                }
+                rom.set_rom_bank(rom_bank);
+            }
             _ => panic!("Writing to unknown Cartridge ROM location 0x{:04x}", addr),
         }
     },