diff --git a/Marlin/stepper.h b/Marlin/stepper.h
index 7e9e1b0522..a0bb030234 100644
--- a/Marlin/stepper.h
+++ b/Marlin/stepper.h
@@ -132,7 +132,7 @@ class Stepper {
       #if E_STEPPERS > 1
         static int8_t LA_active_extruder; // Copy from current executed block. Needed because current_block is set to NULL "too early".
       #else
-        constexpr int8_t LA_active_extruder = 0;
+        static constexpr int8_t LA_active_extruder = 0;
       #endif
 
     #else // !LIN_ADVANCE
diff --git a/Marlin/ubl.h b/Marlin/ubl.h
index 4b0316974f..1053862d93 100644
--- a/Marlin/ubl.h
+++ b/Marlin/ubl.h
@@ -130,7 +130,7 @@ class unified_bed_leveling {
 
     // 15 is the maximum nubmer of grid points supported + 1 safety margin for now,
     // until determinism prevails
-    constexpr static float _mesh_index_to_xpos[16] PROGMEM = {
+    static constexpr float _mesh_index_to_xpos[16] PROGMEM = {
                               MESH_MIN_X +  0 * (MESH_X_DIST), MESH_MIN_X +  1 * (MESH_X_DIST),
                               MESH_MIN_X +  2 * (MESH_X_DIST), MESH_MIN_X +  3 * (MESH_X_DIST),
                               MESH_MIN_X +  4 * (MESH_X_DIST), MESH_MIN_X +  5 * (MESH_X_DIST),
@@ -141,7 +141,7 @@ class unified_bed_leveling {
                               MESH_MIN_X + 14 * (MESH_X_DIST), MESH_MIN_X + 15 * (MESH_X_DIST)
                             };
 
-    constexpr static float _mesh_index_to_ypos[16] PROGMEM = {
+    static constexpr float _mesh_index_to_ypos[16] PROGMEM = {
                               MESH_MIN_Y +  0 * (MESH_Y_DIST), MESH_MIN_Y +  1 * (MESH_Y_DIST),
                               MESH_MIN_Y +  2 * (MESH_Y_DIST), MESH_MIN_Y +  3 * (MESH_Y_DIST),
                               MESH_MIN_Y +  4 * (MESH_Y_DIST), MESH_MIN_Y +  5 * (MESH_Y_DIST),