diff --git a/README.md b/README.md
index d8c79042..9dd3e818 100644
--- a/README.md
+++ b/README.md
@@ -384,6 +384,11 @@ OPTIONS:
                              If no hz value is given, the highest possible refreshrate
                              will be used.
 
+  --dummy-display            Simulate a display. Useful for running apps
+                             without a display attached.
+  --dummy-display-size "width,height" The width & height of the dummy display
+                             in pixels.
+
   -h, --help                 Show this help and exit.
 
 EXAMPLES:
diff --git a/src/flutter-pi.c b/src/flutter-pi.c
index 35f16002..5f296a09 100644
--- a/src/flutter-pi.c
+++ b/src/flutter-pi.c
@@ -136,6 +136,11 @@ OPTIONS:\n\
   --videomode widthxheight@hz  Uses an output videomode that satisfies the argument.\n\
                              If no hz value is given, the highest possible refreshrate\n\
                              will be used.\n\
+\n\
+  --dummy-display            Simulate a display. Useful for running apps\n\
+                             without a display attached.\n\
+  --dummy-display-size \"width,height\" The width & height of the dummy display\n\
+                             in pixels.\n\
 \n\
   -h, --help                 Show this help and exit.\n\
 \n\