diff --git a/numpy/f2py/setup.py b/numpy/f2py/setup.py
index aac3d33f5df5..37aab191c433 100644
--- a/numpy/f2py/setup.py
+++ b/numpy/f2py/setup.py
@@ -62,7 +62,7 @@ def generate_f2py_py(build_dir):
     except ValueError: pass
 os.environ["NO_SCIPY_IMPORT"]="f2py"
 if mode=="g3-numpy":
-    sys.stderr.write("G3 f2py support is not implemented, yet.\n")
+    sys.stderr.write("G3 f2py support is not implemented, yet.\\n")
     sys.exit(1)
 elif mode=="2e-numeric":
     from f2py2e import main
@@ -72,7 +72,7 @@ def generate_f2py_py(build_dir):
 elif mode=="2e-numpy":
     from numpy.f2py import main
 else:
-    sys.stderr.write("Unknown mode: " + repr(mode) + "\n")
+    sys.stderr.write("Unknown mode: " + repr(mode) + "\\n")
     sys.exit(1)
 main()
 '''%(os.path.basename(sys.executable)))