diff --git a/Source/cmInstallFilesCommand.cxx b/Source/cmInstallFilesCommand.cxx
index b1dbf0df9..6f4558334 100644
--- a/Source/cmInstallFilesCommand.cxx
+++ b/Source/cmInstallFilesCommand.cxx
@@ -63,7 +63,7 @@ void cmInstallFilesCommand::FinalPass()
       {
       // replace any variables
       std::string temps = *s;
-      testf = cmSystemTools::GetFilenameWithoutExtension(temps) + ext;
+      testf = cmSystemTools::GetFilenameWithoutLastExtension(temps) + ext;
       // add to the result
       targetSourceLists.push_back(testf);
       }