diff --git a/src/sdlwindow.cpp b/src/sdlwindow.cpp
index 3bff096..4c56bf1 100644
--- a/src/sdlwindow.cpp
+++ b/src/sdlwindow.cpp
@@ -295,7 +295,9 @@ void inputSDLThreadRun( void )
 						g_nOutputWidthPts = width;
 						g_nOutputHeightPts = height;
 
+#if SDL_VERSION_ATLEAST(2, 26, 0)
 						SDL_GetWindowSizeInPixels( g_SDLWindow, &width, &height );
+#endif
 						g_nOutputWidth = width;
 						g_nOutputHeight = height;