diff --git a/whisper_live/backend/openvino_backend.py b/whisper_live/backend/openvino_backend.py
index 1d9586f..c072740 100644
--- a/whisper_live/backend/openvino_backend.py
+++ b/whisper_live/backend/openvino_backend.py
@@ -99,6 +99,20 @@ class ServeClientOpenVINO(ServeClientBase):
         logging.info(f"Using OpenVINO device: {self.device}")
         logging.info(f"Running OpenVINO backend with language: {self.language} and task: {self.task}")
 
+    def get_segment_end(self, segment):
+        """
+        Override base class implementation to handle OpenVINO's end timestamp sentinel value.
+
+        WhisperDecodedResultChunk.end_ts is -1.0 when the model did not predict an ending
+        timestamp (e.g. audio cut off mid-word). A negative end_ts causes a negative array
+        index in _identify_speaker(), producing an empty audio slice and silently disabling
+        diarization. Fall back to start_ts + 1.0 second in that case.
+        """
+        end = getattr(segment, "end_ts", -1.0)
+        if end < 0:
+            return getattr(segment, "start_ts", 0) + 1.0
+        return end
+
     def create_model(self, model_id):
         """
         Instantiates a new model, sets it as the transcriber.