diff --git a/imgui/src/string.rs b/imgui/src/string.rs
index 98e3297..1ba181b 100644
--- a/imgui/src/string.rs
+++ b/imgui/src/string.rs
@@ -6,6 +6,7 @@ use std::str;
 use std::{fmt, ptr};
 
 /// this is the unsafe cell upon which we build our abstraction.
+#[derive(Debug)]
 pub(crate) struct UiBuffer {
     buffer: Vec<u8>,
     max_len: usize,