diff --git a/src/chip8/memory.rs b/src/chip8/memory.rs
index 4a3c5db..ffb14c9 100644
--- a/src/chip8/memory.rs
+++ b/src/chip8/memory.rs
@@ -11,7 +11,7 @@ pub fn read_n_bytes(
     let mut bytes = Vec::new();
     while addr != start_addr + n_bytes {
         assert!(
-            addr >= buffer_len,
+            addr < buffer_len,
             "Couldn't read from Address {addr} exceeds buffer length {buffer_len}"
         );
         bytes.push(buffer[addr]);