diff --git a/examples/streamfld.c b/examples/streamfld.c
index 6fe9406..d55eb04 100644
--- a/examples/streamfld.c
+++ b/examples/streamfld.c
@@ -281,7 +281,7 @@ int main(int argc, char **argv)
       { NULL, 0, NULL, 0 },
     };
 
-    if((opt = getopt_long(argc, argv, "hvr:m:", long_options,
+    if((opt = getopt_long(argc, argv, "hvr:m:p:", long_options,
                           &option_index)) == -1) break;
 
     switch(opt) {