diff --git a/poky/meta/classes-recipe/setuptools3_legacy.bbclass b/poky/meta/classes-recipe/setuptools3_legacy.bbclass
index 21748f9..57de956 100644
--- a/poky/meta/classes-recipe/setuptools3_legacy.bbclass
+++ b/poky/meta/classes-recipe/setuptools3_legacy.bbclass
@@ -49,7 +49,7 @@
         install -d ${D}${PYTHON_SITEPACKAGES_DIR}
         STAGING_INCDIR=${STAGING_INCDIR} \
         STAGING_LIBDIR=${STAGING_LIBDIR} \
-        PYTHONPATH=${D}${PYTHON_SITEPACKAGES_DIR} \
+        PYTHONPATH=${D}${PYTHON_SITEPACKAGES_DIR}:$PYTHONPATH \
         ${STAGING_BINDIR_NATIVE}/${PYTHON_PN}-native/${PYTHON_PN} setup.py \
         build --build-base=${B} install --skip-build ${SETUPTOOLS_INSTALL_ARGS} || \
         bbfatal_log "'${PYTHON_PN} setup.py install ${SETUPTOOLS_INSTALL_ARGS}' execution failed."