diff --git a/libraries/AP_Logger/AP_Logger_File.cpp b/libraries/AP_Logger/AP_Logger_File.cpp
index f4789019a0..35d7325a9e 100644
--- a/libraries/AP_Logger/AP_Logger_File.cpp
+++ b/libraries/AP_Logger/AP_Logger_File.cpp
@@ -1026,7 +1026,7 @@ bool AP_Logger_File::io_thread_alive() const
     // the IO thread is working with hardware - writing to a physical
     // disk.  Unfortunately these hardware devices do not obey our
     // SITL speedup options, so we allow for it here.
-    SITL::SITL *sitl = AP::sitl();
+    SITL::SIM *sitl = AP::sitl();
     if (sitl != nullptr) {
         timeout_ms *= sitl->speedup;
     }