diff --git a/Firmware/ultralcd.cpp b/Firmware/ultralcd.cpp
index e8ed49d1..cfcbadf0 100755
--- a/Firmware/ultralcd.cpp
+++ b/Firmware/ultralcd.cpp
@@ -586,7 +586,7 @@ void lcdui_print_Z_coord(void)
     if (custom_message_type == CustomMsg::MeshBedLeveling)
         lcd_puts_P(_N("Z   --- "));
     else
-		lcd_printf_P(_N("Z%6.2f "), current_position[Z_AXIS]);
+		lcd_printf_P(_N("Z%6.2f%c"), current_position[Z_AXIS], axis_known_position[Z_AXIS]?' ':'?');
 }
 
 #ifdef PLANNER_DIAGNOSTICS