diff --git a/src/osdep/amiberry_gfx.cpp b/src/osdep/amiberry_gfx.cpp
index e101b075..94229e66 100644
--- a/src/osdep/amiberry_gfx.cpp
+++ b/src/osdep/amiberry_gfx.cpp
@@ -257,6 +257,8 @@ static void SDL2_init()
 				mode |= SDL_WINDOW_HIDDEN;
 			else
 				mode |= SDL_WINDOW_SHOWN;
+			// Set Window allow high DPI by default
+			mode |= SDL_WINDOW_ALLOW_HIGHDPI;
 #ifdef USE_OPENGL
 			mode |= SDL_WINDOW_OPENGL;
 #endif
diff --git a/src/osdep/gui/ShowMessage.cpp b/src/osdep/gui/ShowMessage.cpp
index e629c16f..05a49cc9 100644
--- a/src/osdep/gui/ShowMessage.cpp
+++ b/src/osdep/gui/ShowMessage.cpp
@@ -78,6 +78,8 @@ static void InitShowMessage(const std::string& message)
 				mode |= SDL_WINDOW_HIDDEN;
 			else
 				mode |= SDL_WINDOW_SHOWN;
+			// Set Window allow high DPI by default
+			mode |= SDL_WINDOW_ALLOW_HIGHDPI;
 		}
 		else
 		{
diff --git a/src/osdep/gui/main_window.cpp b/src/osdep/gui/main_window.cpp
index edff9481..86fb2102 100644
--- a/src/osdep/gui/main_window.cpp
+++ b/src/osdep/gui/main_window.cpp
@@ -297,6 +297,8 @@ void amiberry_gui_init()
                 mode |= SDL_WINDOW_HIDDEN;
             else
                 mode |= SDL_WINDOW_SHOWN;
+			// Set Window allow high DPI by default
+			mode |= SDL_WINDOW_ALLOW_HIGHDPI;
         }
         else
         {