diff --git a/Marlin/src/inc/SanityCheck.h b/Marlin/src/inc/SanityCheck.h
index 8afd1ae2e2..67862cf931 100644
--- a/Marlin/src/inc/SanityCheck.h
+++ b/Marlin/src/inc/SanityCheck.h
@@ -1517,6 +1517,8 @@ static_assert(COUNT(arm) == LOGICAL_AXES, "AXIS_RELATIVE_MODES must contain " _L
     #error "AUTO_BED_LEVELING_UBL requires EEPROM_SETTINGS."
   #elif !WITHIN(GRID_MAX_POINTS_X, 3, 255) || !WITHIN(GRID_MAX_POINTS_Y, 3, 255)
     #error "GRID_MAX_POINTS_[XY] must be between 3 and 255."
+  #elif ALL(UBL_HILBERT_CURVE, DELTA)
+    #error "UBL_HILBERT_CURVE can only be used with a square / rectangular printable area."
   #endif
 #elif ENABLED(MESH_BED_LEVELING)
   #if ENABLED(DELTA)