--- a/dom/gamepad/linux/LinuxGamepad.cpp
+++ b/dom/gamepad/linux/LinuxGamepad.cpp
@@ -36,17 +36,17 @@ static const char kJoystickPath[] = "/de
 
 //TODO: should find a USB identifier for each device so we can
 // provide something that persists across connect/disconnect cycles.
 typedef struct {
   int index;
   guint source_id;
   int numAxes;
   int numButtons;
-  char idstring[128];
+  char idstring[256];
   char devpath[PATH_MAX];
 } Gamepad;
 
 class LinuxGamepadService {
 public:
   LinuxGamepadService() : mMonitor(nullptr),
                           mMonitorSourceID(0) {
   }