diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2ba70913c454ae129f7e9567d43137bdf129221b..3f3886fd5dd292e7a444005ebe294d7a10a4a97b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -93,7 +93,7 @@ string(REPLACE "." ";" _python_version_list ${Python_VERSION})
 list(GET _python_version_list 0 Python_VERSION_MAJOR)
 list(GET _python_version_list 1 Python_VERSION_MINOR)
 # where Python modules live
-set(PYTHON_MODULE_PATH "python${Python_VERSION_MAJOR}${Python_VERSION_MINOR}/site-packages/")
+set(PYTHON_MODULE_PATH "python${Python_VERSION_MAJOR}.${Python_VERSION_MINOR}/site-packages/")
 
 setup_boost()