diff --git a/Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp b/Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp
index df3faaa50f..7496c9e9b5 100644
--- a/Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp
+++ b/Marlin/src/feature/bedlevel/ubl/ubl_G29.cpp
@@ -788,7 +788,7 @@ void unified_bed_leveling::shift_mesh_height() {
       #endif
 
       #ifndef HUGE_VALF
-        #define HUGE_VALF FLT_MAX
+        #define HUGE_VALF __FLT_MAX__
       #endif
 
       best = do_furthest // Points with valid data or HUGE_VALF are skipped