diff --git a/lib/writers/lvgl/lv_font.js b/lib/writers/lvgl/lv_font.js
index f1d917d..309e4b1 100644
--- a/lib/writers/lvgl/lv_font.js
+++ b/lib/writers/lvgl/lv_font.js
@@ -61,7 +61,7 @@ class LvFont extends Font {
   }
 
   toLVGL() {
-    let guard_name =  this.font_name.toUpperCase();
+    let guard_name =  '_' + this.font_name.toUpperCase() + '_';
 
     return `/*******************************************************************************
  * Size: ${this.src.size} px