diff --git a/src/gl/gl3device.cpp b/src/gl/gl3device.cpp
index 7d45362..b1036c0 100644
--- a/src/gl/gl3device.cpp
+++ b/src/gl/gl3device.cpp
@@ -1344,7 +1344,7 @@ beginUpdate(Camera *cam)
 #ifdef LIBRW_SDL2
 		SDL_GetWindowSize(glGlobals.window, &w, &h);
 #else
-		glfwGetWindowSize(glGlobals.window, &w, &h);
+		glfwGetFramebufferSize(glGlobals.window, &w, &h);
 #endif
 	}else{
 		w = fb->width;