diff --git a/Source/CPack/cmCPackDocumentMacros.cxx b/Source/CPack/cmCPackDocumentMacros.cxx
index 8752e5674..94d539141 100644
--- a/Source/CPack/cmCPackDocumentMacros.cxx
+++ b/Source/CPack/cmCPackDocumentMacros.cxx
@@ -3,6 +3,8 @@
 void cmCPackDocumentMacros::GetMacrosDocumentation(
         std::vector<cmDocumentationEntry>& v)
 {
+   // avoid compiler warning
+   (int)v.size();
    // Commented-out example of use
    //
    //    cmDocumentationEntry e("cpack_<macro>",
diff --git a/Source/CPack/cmCPackDocumentVariables.cxx b/Source/CPack/cmCPackDocumentVariables.cxx
index 8b60d5f0e..27d4df2fe 100644
--- a/Source/CPack/cmCPackDocumentVariables.cxx
+++ b/Source/CPack/cmCPackDocumentVariables.cxx
@@ -3,6 +3,8 @@
 
 void cmCPackDocumentVariables::DefineVariables(cmake* cm)
 {
+  // avoid compiler warning
+  (void*)cm;
   // Subsection: variables defined/used by cpack,
   // which are common to all CPack generators