diff --git a/Marlin/src/MarlinCore.cpp b/Marlin/src/MarlinCore.cpp
index 2e9f6a6fc2..eb57835f96 100644
--- a/Marlin/src/MarlinCore.cpp
+++ b/Marlin/src/MarlinCore.cpp
@@ -216,6 +216,10 @@
   #include "feature/controllerfan.h"
 #endif
 
+#if HAS_PRUSA_MMU1
+  #include "feature/mmu/mmu.h"
+#endif
+
 #if HAS_PRUSA_MMU2
   #include "feature/mmu/mmu2.h"
 #endif
diff --git a/Marlin/src/feature/mmu/mmu.cpp b/Marlin/src/feature/mmu/mmu.cpp
index 6340f3c301..58c49ed224 100644
--- a/Marlin/src/feature/mmu/mmu.cpp
+++ b/Marlin/src/feature/mmu/mmu.cpp
@@ -24,9 +24,9 @@
 
 #if HAS_PRUSA_MMU1
 
-#include "../MarlinCore.h"
-#include "../module/planner.h"
-#include "../module/stepper.h"
+#include "../../MarlinCore.h"
+#include "../../module/planner.h"
+#include "../../module/stepper.h"
 
 void mmu_init() {
   SET_OUTPUT(E_MUX0_PIN);