diff --git a/fs/Exfat.cpp b/fs/Exfat.cpp
index 5c15075..c624eb9 100644
--- a/fs/Exfat.cpp
+++ b/fs/Exfat.cpp
@@ -43,7 +43,7 @@
     cmd.push_back(kFsckPath);
     cmd.push_back(source);
 
-    int rc = ForkExecvp(cmd, sFsckUntrustedContext);
+    int rc = ForkExecvp(cmd, nullptr, sFsckUntrustedContext);
     if (rc == 0) {
         LOG(INFO) << "Check OK";
         return 0;