1 files changed, 1 insertions, 1 deletions

diff --git a/src/firejail/x11.c b/src/firejail/x11.c
index 9a59b873b..5c6f045e7 100644
--- a/src/firejail/x11.c
+++ b/src/firejail/x11.c
@@ -436,7 +436,7 @@ void x11_start_xpra(int argc, char **argv) {
         }
 
         // build attach command
-        char *attach_argv[] = { "xpra", "--title=\"firejail x11 sandbox\"", "attach", display_str };
+        char *attach_argv[] = { "xpra", "--title=\"firejail x11 sandbox\"", "attach", display_str, NULL };
 
         // run attach command
         client = fork();