diff --git a/src/gl/scene/gl_scene.cpp b/src/gl/scene/gl_scene.cpp
index 7a961d2cd..99776afbe 100644
--- a/src/gl/scene/gl_scene.cpp
+++ b/src/gl/scene/gl_scene.cpp
@@ -838,6 +838,7 @@ sector_t * FGLRenderer::RenderViewpoint (AActor * camera, GL_IRECT * bounds, flo
 		angle_t a1 = FrustumAngle();
 		clipper.SafeAddClipRangeRealAngles(viewangle + a1, viewangle - a1);
 
+		GLWallLightEntryArena.FreeAll();
 		ProcessScene(toscreen);
 		if (mainview) EndDrawScene(retval);	// do not call this for camera textures.
 		eye->TearDown();