diff --git a/src/shape.rs b/src/shape.rs
index 43332d2..292cda0 100644
--- a/src/shape.rs
+++ b/src/shape.rs
@@ -5,6 +5,7 @@
 #[cfg(not(feature = "std"))]
 use alloc::vec::Vec;
 use core::cmp::{max, min};
+use core::fmt;
 use core::mem;
 use core::ops::Range;
 use unicode_script::{Script, UnicodeScript};
@@ -75,6 +76,12 @@ pub struct ShapeBuffer {
     visual_lines: Vec<VisualLine>,
 }
 
+impl fmt::Debug for ShapeBuffer {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.pad("ShapeBuffer { .. }")
+    }
+}
+
 fn shape_fallback(
     scratch: &mut ShapeBuffer,
     glyphs: &mut Vec<ShapeGlyph>,