diff --git a/renderdoc/driver/gl/gl_replay_linux.cpp b/renderdoc/driver/gl/gl_replay_linux.cpp
index 8da12ff2b..5cadbe77a 100644
--- a/renderdoc/driver/gl/gl_replay_linux.cpp
+++ b/renderdoc/driver/gl/gl_replay_linux.cpp
@@ -166,7 +166,7 @@ uint64_t GLReplay::MakeOutputWindow(void *wn, bool depth)
 
 	m_OutputWindows[ret] = win;
 
-	return 0;
+	return ret;
 }
 
 void GLReplay::DestroyOutputWindow(uint64_t id)