diff --git a/libs/app/source/app.cpp b/libs/app/source/app.cpp
index 337e3614..de2b2232 100644
--- a/libs/app/source/app.cpp
+++ b/libs/app/source/app.cpp
@@ -41,6 +41,8 @@ namespace psemek::app
 
 		bool running = false;
 
+		bool had_initial_resize = false;
+
 		clock::time_point start_time;
 
 		~impl()
@@ -131,6 +133,7 @@ namespace psemek::app
 		case SDL_WINDOWEVENT: switch (e.window.event)
 			{
 			case SDL_WINDOWEVENT_RESIZED:
+				impl().had_initial_resize = true;
 				on_resize(e.window.data1, e.window.data2);
 				break;
 			case SDL_WINDOWEVENT_FOCUS_GAINED:
@@ -199,6 +202,13 @@ namespace psemek::app
 		while (running())
 		{
 			poll_events();
+			if (!impl().had_initial_resize)
+			{
+				int w, h;
+				SDL_GetWindowSize(impl().window, &w, &h);
+				impl().had_initial_resize = true;
+				on_resize(w, h);
+			}
 			if (!running()) break;
 			update();
 			draw();