diff --git a/Marlin/src/gcode/calibrate/G34_M422.cpp b/Marlin/src/gcode/calibrate/G34_M422.cpp
index 11f3eac6fa..328a40dbb4 100644
--- a/Marlin/src/gcode/calibrate/G34_M422.cpp
+++ b/Marlin/src/gcode/calibrate/G34_M422.cpp
@@ -45,6 +45,10 @@
   #include "../../libs/least_squares_fit.h"
 #endif
 
+#if ENABLED(BLTOUCH)
+  #include "../../feature/bltouch.h"
+#endif
+
 #define DEBUG_OUT ENABLED(DEBUG_LEVELING_FEATURE)
 #include "../../core/debug_out.h"