diff --git a/TileCalorimeter/TileCalib/TileCalibBlobObjs/src/TileCalibDrawerFlt.cxx b/TileCalorimeter/TileCalib/TileCalibBlobObjs/src/TileCalibDrawerFlt.cxx
index 967c4ae5917d48ad6be5806950b33034e1027212..532af9ec33b2cafeaf8116b58e9209f49c42a8a4 100644
--- a/TileCalorimeter/TileCalib/TileCalibBlobObjs/src/TileCalibDrawerFlt.cxx
+++ b/TileCalorimeter/TileCalib/TileCalibBlobObjs/src/TileCalibDrawerFlt.cxx
@@ -263,7 +263,7 @@ float
 TileCalibDrawerFlt::getDY(unsigned int channel, unsigned int adc, float x) const 
 {
   float y(-9999.), dy(-9999.);
-  getYDY(channel,adc,x,y,dy);
+  (void)getYDY(channel,adc,x,y,dy);
   return dy;
 }