diff --git a/src/i810_reg.h b/src/i810_reg.h
index 834b948c..cc4620a8 100644
--- a/src/i810_reg.h
+++ b/src/i810_reg.h
@@ -497,6 +497,7 @@ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 #define FWATER_BLC       0x20d8
 #define FWATER_BLC2	 0x20dc
+#define FWATER_BLC_SELF	 0x20e0
 #define MM_BURST_LENGTH     0x00700000
 #define MM_FIFO_WATERMARK   0x0001F000
 #define LM_BURST_LENGTH     0x00000700
diff --git a/src/i830_debug.c b/src/i830_debug.c
index 074e8b9c..b9f64bf6 100644
--- a/src/i830_debug.c
+++ b/src/i830_debug.c
@@ -546,6 +546,10 @@ static struct i830SnapshotRec {
     DEFINEREG(FBC_FENCE_OFF),
     DEFINEREG(FBC_MOD_NUM),
 
+    DEFINEREG(FWATER_BLC),
+    DEFINEREG(FWATER_BLC2),
+    DEFINEREG(FWATER_BLC_SELF),
+
     DEFINEREG2(FPA0, i830_debug_fp),
     DEFINEREG2(FPA1, i830_debug_fp),
     DEFINEREG2(DPLL_A, i830_debug_dpll),