diff --git a/include/vpad/input.h b/include/vpad/input.h
index 41c72e89..e55d6d78 100644
--- a/include/vpad/input.h
+++ b/include/vpad/input.h
@@ -321,6 +321,7 @@ WUT_CHECK_OFFSET(VPADStatus, 0xA2, micStatus);
 WUT_CHECK_OFFSET(VPADStatus, 0xA3, slideVolumeEx);
 WUT_CHECK_SIZE(VPADStatus, 0xAC);
 
+typedef void(*VPADSamplingCallback)(VPADChan chan);
 
 /**
  * Initialises the VPAD library for use.
@@ -985,6 +986,10 @@ int32_t
 VPADSetSensorBar(VPADChan chan,
                  BOOL on);
 
+VPADSamplingCallback
+VPADSetSamplingCallback(VPADChan chan,
+                        VPADSamplingCallback callback);
+
 #ifdef __cplusplus
 }
 #endif