diff --git a/src/genworld_gui.cpp b/src/genworld_gui.cpp
--- a/src/genworld_gui.cpp
+++ b/src/genworld_gui.cpp
@@ -698,7 +698,7 @@ struct GenerateLandscapeWindow : public 
 			 * As UINT32_MAX is a 'magic' value (use random seed) it
 			 * should not be possible to be entered into the input
 			 * field; the generate seed button can be used instead. */
-			_settings_newgame.game_creation.generation_seed = minu(strtoul(this->edit_str_buf, NULL, 10), UINT32_MAX - 1);
+			_settings_newgame.game_creation.generation_seed = minu(strtoul(this->text.buf, NULL, 10), UINT32_MAX - 1);
 		}
 	}