diff --git a/mozilla/security/manager/ssl/src/nsCertTree.cpp b/mozilla/security/manager/ssl/src/nsCertTree.cpp
index f4c041b0a06..bd59611c566 100644
--- a/mozilla/security/manager/ssl/src/nsCertTree.cpp
+++ b/mozilla/security/manager/ssl/src/nsCertTree.cpp
@@ -723,7 +723,7 @@ nsCertTree::GetCellText(PRInt32 row, nsITreeColumn* col,
 
   PRInt32 colIndex;
   col->GetIndex(&colIndex);
-  PRUint32 arrayIndex=colIndex+absoluteCertOffset*mNumRows;
+  PRUint32 arrayIndex=absoluteCertOffset+colIndex*mNumRows;
   PRUint32 arrayLength=0;
   if (mCellText) {
     mCellText->GetLength(&arrayLength);