diff --git a/src/eventcomm.c b/src/eventcomm.c
index 05cfec1..a0fc9ec 100644
--- a/src/eventcomm.c
+++ b/src/eventcomm.c
@@ -1040,7 +1040,8 @@ EventAutoDevProbe(InputInfoPtr pInfo, const char *device)
             int rc;
             struct libevdev *evdev;
 
-            sprintf(fname, "%s/%s", DEV_INPUT_EVENT, namelist[i]->d_name);
+            snprintf(fname, sizeof(fname), "%s/%s",
+                     DEV_INPUT_EVENT, namelist[i]->d_name);
             SYSCALL(fd = open(fname, O_RDONLY));
             if (fd < 0)
                 continue;