diff --git a/src/posix/sdl/sdlglvideo.cpp b/src/posix/sdl/sdlglvideo.cpp
index 7e6dd8930..7858fdad9 100644
--- a/src/posix/sdl/sdlglvideo.cpp
+++ b/src/posix/sdl/sdlglvideo.cpp
@@ -29,7 +29,7 @@
 
 // TYPES -------------------------------------------------------------------
 
-IMPLEMENT_ABSTRACT_CLASS(SDLGLFB, false, false, false, false)
+IMPLEMENT_CLASS(SDLGLFB, true, false)
 
 struct MiniModeInfo
 {