diff --git a/src/plugins/projectexplorer/toolchain.h b/src/plugins/projectexplorer/toolchain.h
index abc6f115580..8c461bd3987 100644
--- a/src/plugins/projectexplorer/toolchain.h
+++ b/src/plugins/projectexplorer/toolchain.h
@@ -46,6 +46,7 @@ namespace ProjectExplorer {
 namespace Internal { class ToolChainPrivate; }
 
 namespace Deprecated {
+// Deprecated in 4.3:
 namespace Toolchain {
 enum Language {
     None = 0,
@@ -155,7 +156,6 @@ protected:
     explicit ToolChain(Core::Id typeId, Detection d);
     explicit ToolChain(const ToolChain &);
 
-
     void toolChainUpdated();
 
     // Make sure to call this function when deriving!