diff --git a/gtsam/base/Makefile.am b/gtsam/base/Makefile.am
index 3383f7e57..da4e07bbd 100644
--- a/gtsam/base/Makefile.am
+++ b/gtsam/base/Makefile.am
@@ -26,7 +26,7 @@ sources += timing.cpp debug.cpp
 check_PROGRAMS += tests/testDebug tests/testTestableAssertions
 
 # Manifolds and Lie Groups
-headers += Manifold.h
+headers += Manifold.h Group.h
 headers += Lie.h Lie-inl.h lieProxies.h LieScalar.h
 sources += LieVector.cpp
 check_PROGRAMS += tests/testLieVector tests/testLieScalar