diff --git a/Detectors/ITSMFT/MFT/base/src/Support.cxx b/Detectors/ITSMFT/MFT/base/src/Support.cxx
index 856bb86c33c10..d3059e541131f 100644
--- a/Detectors/ITSMFT/MFT/base/src/Support.cxx
+++ b/Detectors/ITSMFT/MFT/base/src/Support.cxx
@@ -451,12 +451,13 @@ void Support::initParameters()
   // ### halfdisk 03
   mNumberOfVoids[3] = 6; //Number of Voids (big holes) in each halfDisk support
   mVoidVert[3] = new Double_t[mNumberOfVoids[3]][4][2]{
-    {{-21.377, 15.3}, {-20.075, 11.5}, {-17.0, 11.5}, {-17.0, 15.3}},       // a,b,c,d
-    {{-19.053, 9.5}, {-13.964, 3.5}, {-14.0, 7.5}, {-14.0, 9.5}},           // e,f,i,j
-    {{-13.964 - .02, 3.5}, {-10.0, 3.5}, {-10.0, 7.5}, {-14.0 - .02, 7.5}}, // f,g,h,i,
-    {{21.377, 15.3}, {17.0, 15.3}, {17.0, 11.5}, {20.075, 11.5}},           // s,t,q,r
-    {{19.053, 9.5}, {14.0, 9.5}, {14.0 - .02, 7.5}, {13.964 - .02, 3.5}},   // m,n,o,l
-    {{13.964, 3.5}, {14.0, 7.5}, {10.0, 7.5}, {10.0, 3.5}}                  // l,o,p,k
+    {{-21.377, 15.3}, {-20.075, 11.5}, {-17.0, 11.5}, {-17.0, 15.3}}, // a,b,c,d
+    // pockets e..j and k..p cut as two convex pieces split at y = 7.5, overlapping by .02; u, u', v, v' lie on e-f and l-m
+    {{-19.053, 9.5}, {-19.053 + 5.089 * 2.02 / 6., 7.48}, {-14.0, 7.48}, {-14.0, 9.5}}, // e,u',i',j
+    {{-19.053 + 5.089 / 3., 7.5}, {-13.964, 3.5}, {-10.0, 3.5}, {-10.0, 7.5}},          // u,f,g,h
+    {{21.377, 15.3}, {17.0, 15.3}, {17.0, 11.5}, {20.075, 11.5}},                       // s,t,q,r
+    {{14.0, 9.5}, {14.0, 7.48}, {19.053 - 5.089 * 2.02 / 6., 7.48}, {19.053, 9.5}},     // n,o',v',m
+    {{10.0, 7.5}, {10.0, 3.5}, {13.964, 3.5}, {19.053 - 5.089 / 3., 7.5}}               // p,k,l,v
   };
 
   // ### halfdisk 04