diff --git a/multimodalinput/kits/c/input/oh_input_manager.h b/multimodalinput/kits/c/input/oh_input_manager.h
index 7506a28f9f85bc13507c452b224163cd1e88a31c..ec240e2641fd6d235f934a1c320c24d883598ec9 100644
--- a/multimodalinput/kits/c/input/oh_input_manager.h
+++ b/multimodalinput/kits/c/input/oh_input_manager.h
@@ -683,6 +683,19 @@ int64_t OH_Input_GetTouchEventActionTime(const struct Input_TouchEvent* touchEve
  */
 void OH_Input_CancelInjection();
 
+/**
+ * @brief Obtains the interval since the last system input event.
+ *
+ * @param timeInterval Interval, in nanoseconds.
+ * @return OH_Input_GetIntervalSinceLastInput status code, specifically.
+ *         {@Link INPUT_SUCCESS} if the Operation is successful.\n
+ *         {@Link INPUT_SERVICE_EXCEPTION} otherwise.\n
+ *         {@link INPUT_PARAMETER_ERROR} Parameter check failed.\n
+ * @syscap SystemCapability.MultimodalInput.Input.Core
+ * @since 13
+ */
+int32_t OH_Input_GetIntervalSinceLastInput(int64_t *timeInterval);
+
 #ifdef __cplusplus
 }
 #endif