diff --git a/cmake_support/FindOPENSTRUCTURE.cmake b/cmake_support/FindOPENSTRUCTURE.cmake
index 5e21d7262ca508e87cbe7c41d7ba31f95fd830e4..4ba14ca4b0fb2ab4d19bce75add833b611bc5a00 100644
--- a/cmake_support/FindOPENSTRUCTURE.cmake
+++ b/cmake_support/FindOPENSTRUCTURE.cmake
@@ -27,7 +27,7 @@ macro(find_OPENSTRUCTURE OST_ROOT HEADER_NAMES PYMOD_NAME)
     set(FOUND_LIB FOUND_LIB-NOTFOUND)
     find_library(FOUND_LIB 
       NAMES ost_${LIB}
-      HINTS "${PYTHON_ROOT}"
+      HINTS "${Python_ROOT_DIR}"
       PATH ${OST_ROOT}
       PATH_SUFFIXES lib lib64
       NO_SYSTEM_ENVIRONMENT_PATH NO_DEFAULT_PATH