diff --git a/MuonSpectrometer/MuonReconstruction/MuonSegmentMakers/MuonSegmentMakerTools/MuonSegmentMomentum/CMakeLists.txt b/MuonSpectrometer/MuonReconstruction/MuonSegmentMakers/MuonSegmentMakerTools/MuonSegmentMomentum/CMakeLists.txt
index f1d713b643be3e1fb5e4fe6176e4f4f93c4e0c99..b51509a05d41312953b3c78360d03b990b96399f 100644
--- a/MuonSpectrometer/MuonReconstruction/MuonSegmentMakers/MuonSegmentMakerTools/MuonSegmentMomentum/CMakeLists.txt
+++ b/MuonSpectrometer/MuonReconstruction/MuonSegmentMakers/MuonSegmentMakerTools/MuonSegmentMomentum/CMakeLists.txt
@@ -28,6 +28,7 @@ find_package( Eigen )
 # Component(s) in the package:
 atlas_add_library( MuonSegmentMomentumLib
                    src/*.cxx
+                   NO_PUBLIC_HEADERS
                    PRIVATE_INCLUDE_DIRS ${EIGEN_INCLUDE_DIRS}
                    LINK_LIBRARIES AthenaBaseComps GaudiKernel MagFieldInterfaces MuonRecToolInterfaces MuonIdHelpersLib
                    PRIVATE_LINK_LIBRARIES ${EIGEN_LIBRARIES} GeoPrimitives MuonSegment TrkGeometry TrkCompetingRIOsOnTrack TrkParameters TrkRIO_OnTrack TrkExInterfaces TrkExUtils )