diff --git a/src/app/opengl/window.cpp b/src/app/opengl/window.cpp
index 1de79ecc3..f2aa9c60b 100644
--- a/src/app/opengl/window.cpp
+++ b/src/app/opengl/window.cpp
@@ -68,6 +68,7 @@ static void window_display_text(int x, int y, const char *text)
 
   if (text != last_text) {
     printf("%s\n", text);
+    fflush(stdout);
     last_text = text;
   }
 #endif