diff --git a/src/backends/tolk.rs b/src/backends/tolk.rs
index 370da65..c71cdfa 100644
--- a/src/backends/tolk.rs
+++ b/src/backends/tolk.rs
@@ -28,7 +28,25 @@ impl Backend for Tolk {
 
     fn speak(&mut self, text: &str, interrupt: bool) -> Result<(), Error> {
         trace!("speak({}, {})", text, interrupt);
-        self.0.speak(text, interrupt);
+        const BUFFER_LENGTH: usize = 300;
+        if text.len() <= BUFFER_LENGTH {
+            self.0.speak(text, interrupt);
+        } else {
+            if interrupt {
+                self.stop()?;
+            }
+            let tokens = text.split_whitespace();
+            let mut buffer = String::new();
+            for token in tokens {
+                if buffer.len() + token.len() > BUFFER_LENGTH {
+                    self.0.speak(buffer, false);
+                    buffer = String::new();
+                } else {
+                    buffer.push_str(token);
+                    buffer.push(' ');
+                }
+            }
+        }
         Ok(())
     }