diff --git a/contrib/PyCuAmpcor/examples/cuDenseOffsets.py b/contrib/PyCuAmpcor/examples/cuDenseOffsets.py
index 1166f2b..4ad9ece 100755
--- a/contrib/PyCuAmpcor/examples/cuDenseOffsets.py
+++ b/contrib/PyCuAmpcor/examples/cuDenseOffsets.py
@@ -104,7 +104,7 @@ def createParser():
     # gpu settings
     proc = parser.add_argument_group('Processing parameters')
     proc.add_argument('--gpuid', '--gid', '--gpu-id', dest='gpuid', type=int, default=0,
-                        help='GPU ID (default: %(default)).')
+                        help='GPU ID (default: %(default)s).')
     proc.add_argument('--nstreams', dest='nstreams', type=int, default=2,
                         help='Number of cuda streams (default: %(default)s).')
     proc.add_argument('--usemmap', dest='usemmap', type=int, default=1,