--- a/layout/tables/SpanningCellSorter.cpp
+++ b/layout/tables/SpanningCellSorter.cpp
@@ -56,17 +56,17 @@ SpanningCellSorter::SpanningCellSorter(n
 }
 
 SpanningCellSorter::~SpanningCellSorter()
 {
     if (mHashTable.entryCount) {
         PL_DHashTableFinish(&mHashTable);
         mHashTable.entryCount = 0;
     }
-    delete mSortedHashTable;
+    delete [] mSortedHashTable;
     mPresShell->PopStackMemory();
 }
 
 /* static */ PLDHashTableOps
 SpanningCellSorter::HashTableOps = {
     PL_DHashAllocTable,
     PL_DHashFreeTable,
     HashTableHashKey,