1 files changed, 6 insertions, 3 deletions

diff --git a/src/firejail/usage.c b/src/firejail/usage.c
index 903817099..7db91b5a9 100644
--- a/src/firejail/usage.c
+++ b/src/firejail/usage.c
@@ -282,10 +282,13 @@ void usage(void) {
         printf("    --writable-etc - /etc directory is mounted read-write.\n\n");
         printf("    --writable-var - /var directory is mounted read-write.\n\n");
         
-        printf("    --x11 - enable X11 server. The software checks first if Xpra is installed,\n");
-        printf("\tthen it checks if Xephyr is installed.\n\n");
-        printf("    --x11=xpra - enable Xpra X11 server.\n\n");
+        printf("    --x11 - enable X11 sandboxing. The software checks first if Xpra is\n");
+        printf("\tinstalled, then it checks if Xephyr is installed. If all fails, it will\n");
+        printf("\tattempt to use X11 security extension.\n\n");
+        printf("    --x11=none - disable access to X11 sockets.\n\n");
         printf("    --x11=xephyr - enable Xephyr X11 server. The window size is 800x600.\n\n");
+        printf("    --x11=xorg - enable X11 security extension.\n\n");
+        printf("    --x11=xpra - enable Xpra X11 server.\n\n");
         printf("    --zsh - use /usr/bin/zsh as default shell.\n\n");
         printf("\n");
         printf("\n");