diff --git a/butano/include/bn_config_sprite_text.h b/butano/include/bn_config_sprite_text.h
index 8f4c600c7..0a0f55b59 100644
--- a/butano/include/bn_config_sprite_text.h
+++ b/butano/include/bn_config_sprite_text.h
@@ -26,4 +26,15 @@
     #define BN_CFG_SPRITE_TEXT_MAX_UTF8_CHARACTERS 4096
 #endif
 
+/**
+ * @def BN_CFG_SPRITE_TEXT_MAX_UTF8_CHARACTERS_FOR_DUPLICATION_CHECK
+ *
+ * Specifies the maximum number of UTF-8 characters for duplication check to save compile time.
+ *
+ * @ingroup text
+ */
+#ifndef BN_CFG_SPRITE_TEXT_MAX_UTF8_CHARACTERS_FOR_DUPLICATION_CHECK
+    #define BN_CFG_SPRITE_TEXT_MAX_UTF8_CHARACTERS_FOR_DUPLICATION_CHECK 100
+#endif
+
 #endif
diff --git a/butano/include/bn_sprite_font.h b/butano/include/bn_sprite_font.h
index 67abda401..c33ce1c32 100644
--- a/butano/include/bn_sprite_font.h
+++ b/butano/include/bn_sprite_font.h
@@ -118,7 +118,8 @@ class sprite_font
         BN_ASSERT(utf8_characters_ref.size() <= BN_CFG_SPRITE_TEXT_MAX_UTF8_CHARACTERS,
                    "Invalid UTF-8 characters count: ", utf8_characters_ref.size());
         BN_ASSERT(_validate_utf8_characters(), "UTF-8 characters validation failed");
-        //BN_ASSERT(! _duplicated_utf8_characters(), "There's duplicated UTF-8 characters");
+        BN_ASSERT(BN_CFG_SPRITE_TEXT_MAX_UTF8_CHARACTERS > BN_CFG_SPRITE_TEXT_MAX_UTF8_CHARACTERS_FOR_DUPLICATION_CHECK ||
+                   ! _duplicated_utf8_characters(), "There's duplicated UTF-8 characters");
         BN_ASSERT(character_widths_ref.empty() ||
                    character_widths_ref.size() == 1 + minimum_graphics + utf8_characters_ref.size(),
                    "Invalid character widths count: ", character_widths_ref.size(), " - ",