diff --git a/examples/python/ispc-stream-harness.py b/examples/python/ispc-stream-harness.py
index 722cd917c2610aa2902563b4bb83fb8cda5a3a0d..f603aabbe2e961cb69b310cb570e80c05d1513e2 100644
--- a/examples/python/ispc-stream-harness.py
+++ b/examples/python/ispc-stream-harness.py
@@ -54,7 +54,8 @@ else:
 
 
 def main():
-    with open("tasksys.cpp") as ts_file:
+    this_dir = os.path.dirname(__file__)
+    with open(os.path.join(this_dir, "tasksys.cpp")) as ts_file:
         tasksys_source = ts_file.read()
 
     def make_knl(name, insn, vars):