diff --git a/Makefile b/Makefile
index 4a56fa8cf903271fb1763ee676bcb4229ca68235..6395c76eccf20788b53909404cd2801d02d16efb 100644
--- a/Makefile
+++ b/Makefile
@@ -27,7 +27,8 @@ SRC  =  src/THcInterface.cxx src/THcParmList.cxx src/THcAnalyzer.cxx \
 	src/THcFormula.cxx\
 	src/THcRaster.cxx\
 	src/THcRasteredBeam.cxx\
-	src/THcRasterRawHit.cxx
+	src/THcRasterRawHit.cxx \
+	src/THcScalerEvtHandler.cxx
 
 # Name of your package. 
 # The shared library that will be built will get the name lib$(PACKAGE).so