diff --git a/Source/CTest/cmCTestTestHandler.cxx b/Source/CTest/cmCTestTestHandler.cxx
index c2949790bb..90a33cb73b 100644
--- a/Source/CTest/cmCTestTestHandler.cxx
+++ b/Source/CTest/cmCTestTestHandler.cxx
@@ -1804,7 +1804,7 @@ void cmCTestTestHandler::ExpandTestsToRunInformation(size_t numTests)
   // if end isnot specified then we assume we end with the last test
   if(end == -1)
     {
-    end = numTests;
+    end = static_cast<int>(numTests);
     }
 
   // if the stride wasn't specified then it defaults to 1