diff --git a/stubs/iothread-lock.c b/stubs/iothread-lock.c
index 9b6db2e..eb745d7 100644
--- a/stubs/iothread-lock.c
+++ b/stubs/iothread-lock.c
@@ -7,7 +7,7 @@
     return true;
 }
 
-void qemu_mutex_lock_iothread(void)
+void qemu_mutex_lock_iothread_impl(const char *file, int line)
 {
 }