diff --git a/tools/test/export/build_test.py b/tools/test/export/build_test.py
index 317f4b174f..2a3c906bfd 100644
--- a/tools/test/export/build_test.py
+++ b/tools/test/export/build_test.py
@@ -70,7 +70,7 @@ class ProgenBuildTest(object):
         """
         log = ''
         if tool == 'uvision' or tool == 'uvision4':
-            log = os.path.join(project_dir,"build","build_log.txt")
+            log = path.join(project_dir,"build","build_log.txt")
         elif tool == 'iar':
             log = path.join(project_dir, 'build_log.txt')
         try: