diff --git a/cmake/GtsamCythonWrap.cmake b/cmake/GtsamCythonWrap.cmake
index c3cad9d83..d6190447f 100644
--- a/cmake/GtsamCythonWrap.cmake
+++ b/cmake/GtsamCythonWrap.cmake
@@ -6,12 +6,16 @@ unset(CYTHON_EXECUTABLE CACHE)
 unset(PYTHON_INCLUDE_DIR CACHE)
 unset(PYTHON_MAJOR_VERSION CACHE)
 
-if(GTSAM_PYTHON_VERSION STREQUAL "Default")
-  find_package(PythonInterp REQUIRED)
-  find_package(PythonLibs REQUIRED)
+if(PYTHON_LIBRARY)
+  
 else()
-  find_package(PythonInterp ${GTSAM_PYTHON_VERSION} EXACT REQUIRED)
-  find_package(PythonLibs ${GTSAM_PYTHON_VERSION} EXACT REQUIRED)
+  if(GTSAM_PYTHON_VERSION STREQUAL "Default")
+    find_package(PythonInterp REQUIRED)
+    find_package(PythonLibs REQUIRED)
+  else()
+    find_package(PythonInterp ${GTSAM_PYTHON_VERSION} EXACT REQUIRED)
+    find_package(PythonLibs ${GTSAM_PYTHON_VERSION} EXACT REQUIRED)
+  endif()
 endif()
 find_package(Cython 0.25.2 REQUIRED)