diff --git a/README.md b/README.md
index 5aa3a61..1f1e1bb 100644
--- a/README.md
+++ b/README.md
@@ -14,8 +14,8 @@ Usage: wmbusmeters {options} (auto | /dev/ttyUSBx)] { [meter_name] [meter_type]
 Add more meter quadruplets to listen to more meters.
 Add --verbose for detailed debug information.
     --robot or --robot=json for json output.
-    --robot=fields for semicolon separated fields
-    --separator=X change field separator to X
+    --robot=fields for semicolon separated fields.
+    --separator=X change field separator to X.
     --meterfiles to create status files below tmp,
           named /tmp/meter_name, containing the latest reading.
     --oneshot wait for an update from each meter, then quit.
diff --git a/main.cc b/main.cc
index f0842e4..0deb6c2 100644
--- a/main.cc
+++ b/main.cc
@@ -40,7 +40,9 @@ int main(int argc, char **argv)
         printf("Usage: wmbusmeters [options] (auto | /dev/ttyUSBx) { [meter_name] [meter_type] [meter_id] [meter_key] }* \n\n");
         printf("Add more meter quadruplets to listen to more meters.\n");
         printf("Add --verbose for more detailed information on communication.\n");
-        printf("    --robot for json output.\n");
+        printf("    --robot or --robot=json for json output.\n");
+        printf("    --robot=fields for semicolon separated fields.\n");
+        printf("    --separator=X change field separator to X.\n");
 	printf("    --meterfiles to create status files below tmp,\n"
 	       "       named /tmp/meter_name, containing the latest reading.\n");
 	printf("    --oneshot wait for an update from each meter, then quit.\n\n");