diff --git a/Generators/EvtGen_i/CMakeLists.txt b/Generators/EvtGen_i/CMakeLists.txt
index 1e351bbdcf9220f0a6023a32e44c5c52a64437c5..3cad21a11eca47da54bcf3a805542a28c53a544d 100644
--- a/Generators/EvtGen_i/CMakeLists.txt
+++ b/Generators/EvtGen_i/CMakeLists.txt
@@ -27,6 +27,7 @@ atlas_disable_as_needed()
 # Component(s) in the package:
 if (HEPMC3_USE)
 atlas_add_library( EvtGen_iLib
+                   src/EvtInclusiveDecay.cxx
                    PUBLIC_HEADERS EvtGen_i
                    DEFINITIONS -DEVTGEN_PYTHIA -DEVTGEN_PHOTOS -DEVTGEN_TAUOLA 
                    INCLUDE_DIRS ${Boost_INCLUDE_DIRS} ${HEPPDT_INCLUDE_DIRS} ${PYTHIA8_INCLUDE_DIRS} ${PHOTOSPP_INCLUDE_DIRS} ${TAUOLAPP_INCLUDE_DIRS}  ${EVTGEN_INCLUDE_DIRS} ${ROOT_INCLUDE_DIRS}