diff --git a/python/CMakeLists.txt b/python/CMakeLists.txt
index 9ea873259..4d3d0237d 100644
--- a/python/CMakeLists.txt
+++ b/python/CMakeLists.txt
@@ -31,7 +31,7 @@ endif()
 
 # Find NumPy C-API -- this is part of the numpy package
 find_package(NumPy)
-if(NumPy_FOUND)
+if(NUMPY_FOUND)
   include_directories(${NUMPY_INCLUDE_DIRS})
 endif()
 
@@ -51,7 +51,7 @@ endif()
 find_package(Boost COMPONENTS python${BOOST_PYTHON_VERSION_SUFFIX})
 
 # Build python module library and setup the module inside build
-if(Boost_PYTHON${BOOST_PYTHON_VERSION_SUFFIX_UPPERCASE}_FOUND AND PYTHONLIBS_FOUND AND NumPy_FOUND)
+if(Boost_PYTHON${BOOST_PYTHON_VERSION_SUFFIX_UPPERCASE}_FOUND AND PYTHONLIBS_FOUND AND NUMPY_FOUND)
 	include_directories(${PYTHON_INCLUDE_DIRS})
 	include_directories(${Boost_INCLUDE_DIRS})
 	include_directories(${CMAKE_SOURCE_DIR}/gtsam/3rdparty/numpy_eigen/include/)
@@ -80,7 +80,7 @@ else()
 endif()
 
 # Print warnings (useful for ccmake)
-if(NOT NumPy_FOUND)
+if(NOT NUMPY_FOUND)
     message(WARNING "Numpy not found -- Python module cannot be built.")
 endif()