diff --git a/src/hotspot/share/gc/g1/g1ArraySlicer.cpp b/src/hotspot/share/gc/g1/g1ArraySlicer.cpp
index 39278faff4d55..8c41430e5e1f2 100644
--- a/src/hotspot/share/gc/g1/g1ArraySlicer.cpp
+++ b/src/hotspot/share/gc/g1/g1ArraySlicer.cpp
@@ -112,5 +112,5 @@ size_t G1ArraySlicer::process_slice(objArrayOop array, int slice, int pow) {
   assert (0 < to && to <= len, "to is sane: %d/%d", to, len);
 #endif
 
-  return scan_array(array, from, to);
+  return scan_array(array, from, to - from);
 }