diff --git a/Marlin/src/module/ft_motion.cpp b/Marlin/src/module/ft_motion.cpp
index 7eb8dafa12..8cfc8f2731 100644
--- a/Marlin/src/module/ft_motion.cpp
+++ b/Marlin/src/module/ft_motion.cpp
@@ -92,7 +92,7 @@ uint32_t FTMotion::interpIdx = 0;               // Index of current data point b
 // Shaping variables.
 #if HAS_FTM_SHAPING
   FTMotion::shaping_t FTMotion::shaping = {
-    0
+    zi_idx: 0
     #if HAS_X_AXIS
       , x:{ false, { 0.0f }, { 0.0f }, { 0 }, 0 } // ena, d_zi[], Ai[], Ni[], max_i
     #endif