diff --git a/indra/test_apps/llplugintest/llmediaplugintest.h b/indra/test_apps/llplugintest/llmediaplugintest.h
index 095a2ea3b313da878e0b786973223729a20a31af..c2b2baba95ddad871c9b4a40bd994ac006cea7e6 100644
--- a/indra/test_apps/llplugintest/llmediaplugintest.h
+++ b/indra/test_apps/llplugintest/llmediaplugintest.h
@@ -35,6 +35,7 @@
 #include <vector>
 #include <string>
 #include "llpluginclassmedia.h"
+#include "llgl.h"
 
 // Forward declarations
 class GLUI_Rotation;