diff --git a/cython/gtsam/setup.py.in b/cython/gtsam/setup.py.in
index 7efbb9d68..1e97567c9 100644
--- a/cython/gtsam/setup.py.in
+++ b/cython/gtsam/setup.py.in
@@ -13,7 +13,8 @@ setup(
     "gtsam",
     sources=["gtsam.pyx"],
     include_dirs = ["${CMAKE_SOURCE_DIR}", "${CMAKE_BINARY_DIR}",
-                    "${CMAKE_SOURCE_DIR}/gtsam/3rdparty/Eigen"
+                    "${CMAKE_SOURCE_DIR}/gtsam/3rdparty/Eigen",
+                    "${Boost_INCLUDE_DIR}"
                     ] + eigency.get_includes(include_eigen=False),
     libraries = ['gtsam'],
     library_dirs = ["${CMAKE_BINARY_DIR}/gtsam"],
diff --git a/cython/gtsam_unstable/setup.py.in b/cython/gtsam_unstable/setup.py.in
index 7e81f5b7d..fe6a02fbd 100644
--- a/cython/gtsam_unstable/setup.py.in
+++ b/cython/gtsam_unstable/setup.py.in
@@ -16,7 +16,8 @@ setup(
         "gtsam_unstable",
         sources=["gtsam_unstable.pyx"],
         include_dirs = ["${CMAKE_SOURCE_DIR}", "${CMAKE_BINARY_DIR}",
-                        "${CMAKE_SOURCE_DIR}/gtsam/3rdparty/Eigen"
+                        "${CMAKE_SOURCE_DIR}/gtsam/3rdparty/Eigen",
+                        "${Boost_INCLUDE_DIR}"
                        ] + eigency.get_includes(include_eigen=False),
         libraries=['gtsam', 'gtsam_unstable'],
         library_dirs=["${GTSAM_DIR}/../../"],