diff --git a/Source/cmSourceGroupCommand.cxx b/Source/cmSourceGroupCommand.cxx
index ba74b15be..aa8ef029d 100644
--- a/Source/cmSourceGroupCommand.cxx
+++ b/Source/cmSourceGroupCommand.cxx
@@ -124,6 +124,7 @@ bool cmSourceGroupCommand::InitialPass(std::vector<std::string> const& args)
         src += "/";
         src += args[i];
         }
+      src = cmSystemTools::CollapseFullPath(src.c_str());
       sg->AddGroupFile(src.c_str());
       }
     else