diff -U 3 -dHrN a/sc/inc/arraysumfunctor.hxx b/sc/inc/arraysumfunctor.hxx
--- a/sc/inc/arraysumfunctor.hxx	2023-09-22 21:07:01.000000000 +0200
+++ b/sc/inc/arraysumfunctor.hxx	2023-10-01 09:13:03.523493665 +0200
@@ -85,8 +85,12 @@
 inline KahanSum sumArray(const double* pArray, size_t nSize)
 {
     size_t i = 0;
+#if 0
     const double* pCurrent = pArray;
     KahanSum fSum = executeFast(i, nSize, pCurrent);
+#else
+    KahanSum fSum = 0.0;
+#endif
 
     // sum rest of the array
     for (; i < nSize; ++i)