diff --git a/doc/docutils/Makefile.am b/doc/docutils/Makefile.am
index e1698bb9e..a757dd6f7 100644
--- a/doc/docutils/Makefile.am
+++ b/doc/docutils/Makefile.am
@@ -39,7 +39,7 @@ SPHINXBUILD     = sphinx-build
 PAPEROPT_a4     = -D latex_paper_size=a4
 ALLSPHINXOPTS   = -d doctrees $(PAPEROPT_a4) $(SPHINXOPTS) $(SOURCEDIR)
 
-SPHINX_PYTHONPATH = $(prefix)/lib/python$(PYTHON_VERSION)/site-packages/salome:$(KERNEL_ROOT_DIR)/bin/salome:$(KERNEL_ROOT_DIR)/lib/python$(PYTHON_VERSION)/site-packages/salome:$(OMNIORB_ROOT)/lib/python$(PYTHON_VERSION)/site-packages
+SPHINX_PYTHONPATH = $(prefix)/lib/python$(PYTHON_VERSION)/site-packages/salome:$(prefix)/lib64/python$(PYTHON_VERSION)/site-packages/salome:$(KERNEL_ROOT_DIR)/bin/salome:$(KERNEL_ROOT_DIR)/lib/python$(PYTHON_VERSION)/site-packages/salome:$(KERNEL_ROOT_DIR)/lib64/python$(PYTHON_VERSION)/site-packages/salome:$(OMNIORB_ROOT)/lib/python$(PYTHON_VERSION)/site-packages:$(OMNIORB_ROOT)/lib64/python$(PYTHON_VERSION)/site-packages
 
 SPHINX_LD_LIBRARY_PATH = $(KERNEL_ROOT_DIR)/lib/salome:$(OMNIORB_ROOT)/lib