diff --git a/Marlin/src/lcd/extui/lib/dgus/hiprecy/DGUSDisplayDef.cpp b/Marlin/src/lcd/extui/lib/dgus/hiprecy/DGUSDisplayDef.cpp
index ed26cac3c5..536640ec95 100644
--- a/Marlin/src/lcd/extui/lib/dgus/hiprecy/DGUSDisplayDef.cpp
+++ b/Marlin/src/lcd/extui/lib/dgus/hiprecy/DGUSDisplayDef.cpp
@@ -26,7 +26,7 @@
 
 #if ENABLED(DGUS_LCD_UI_HIPRECY)
 
-#include "../DGUSDisplayDef.h"
+#include "DGUSDisplayDef.h"
 #include "../DGUSDisplay.h"
 #include "../DGUSScreenHandler.h"
 
diff --git a/Marlin/src/lcd/extui/lib/dgus/hiprecy/DGUSDisplayDef.h b/Marlin/src/lcd/extui/lib/dgus/hiprecy/DGUSDisplayDef.h
index 3ff5e06dc1..d18989a48b 100644
--- a/Marlin/src/lcd/extui/lib/dgus/hiprecy/DGUSDisplayDef.h
+++ b/Marlin/src/lcd/extui/lib/dgus/hiprecy/DGUSDisplayDef.h
@@ -21,6 +21,8 @@
  */
 #pragma once
 
+#include "../DGUSDisplayDef.h"
+
 enum DGUSLCD_Screens : uint8_t {
   DGUSLCD_SCREEN_BOOT                 = 160,
   DGUSLCD_SCREEN_MAIN                 =   1,
diff --git a/Marlin/src/lcd/extui/lib/dgus/origin/DGUSDisplayDef.cpp b/Marlin/src/lcd/extui/lib/dgus/origin/DGUSDisplayDef.cpp
index 46e542a959..28e66e5d7c 100644
--- a/Marlin/src/lcd/extui/lib/dgus/origin/DGUSDisplayDef.cpp
+++ b/Marlin/src/lcd/extui/lib/dgus/origin/DGUSDisplayDef.cpp
@@ -26,7 +26,7 @@
 
 #if ENABLED(DGUS_LCD_UI_ORIGIN)
 
-#include "../DGUSDisplayDef.h"
+#include "DGUSDisplayDef.h"
 #include "../DGUSDisplay.h"
 #include "../DGUSScreenHandler.h"
 
diff --git a/Marlin/src/lcd/extui/lib/dgus/origin/DGUSDisplayDef.h b/Marlin/src/lcd/extui/lib/dgus/origin/DGUSDisplayDef.h
index 451c11adba..5c5a315de6 100644
--- a/Marlin/src/lcd/extui/lib/dgus/origin/DGUSDisplayDef.h
+++ b/Marlin/src/lcd/extui/lib/dgus/origin/DGUSDisplayDef.h
@@ -21,6 +21,8 @@
  */
 #pragma once
 
+#include "../DGUSDisplayDef.h"
+
 enum DGUSLCD_Screens : uint8_t {
   DGUSLCD_SCREEN_BOOT = 0,
   DGUSLCD_SCREEN_MAIN = 10,
diff --git a/Marlin/src/libs/buzzer.h b/Marlin/src/libs/buzzer.h
index e901660c87..b86fe998fa 100644
--- a/Marlin/src/libs/buzzer.h
+++ b/Marlin/src/libs/buzzer.h
@@ -118,6 +118,7 @@
 #elif HAS_BUZZER
 
   // Buzz indirectly via the MarlinUI instance
+  #include "../lcd/marlinui.h"
   #define BUZZ(d,f) ui.buzz(d,f)
 
 #else