diff --git a/simgear/structure/subsystem_mgr.cxx b/simgear/structure/subsystem_mgr.cxx
index c5ae8cad..9bfe1b9b 100644
--- a/simgear/structure/subsystem_mgr.cxx
+++ b/simgear/structure/subsystem_mgr.cxx
@@ -668,9 +668,9 @@ SGSubsystemGroup::Member::update (double delta_time_sec)
 
 namespace {
     SGSubsystemMgr* global_defaultSubsystemManager = nullptr;
-    
+
     void registerSubsystemCommands();
-    
+
 } // end of anonymous namespace
 
 SGSubsystemMgr::SGSubsystemMgr () :
@@ -912,19 +912,19 @@ namespace  {
     };
     
     using SybsystemRegistrationVec = std::vector<RegisteredSubsystemData>;
-    
-    SybsystemRegistrationVec global_registrations;
-    
-    SybsystemRegistrationVec::const_iterator findRegistration(const std::string& name)
-    {
-        auto it = std::find_if(global_registrations.begin(),
-                               global_registrations.end(),
-                               [name](const RegisteredSubsystemData& d)
-                               { return name == d.name; });
-        return it;
-    }
 } // of anonymous namespace
 
+static SybsystemRegistrationVec global_registrations;
+
+SybsystemRegistrationVec::const_iterator findRegistration(const std::string& name)
+{
+    auto it = std::find_if(global_registrations.begin(),
+                           global_registrations.end(),
+                           [name](const RegisteredSubsystemData& d)
+                           { return name == d.name; });
+    return it;
+}
+
 void SGSubsystemMgr::registerSubsystem(const std::string& name,
                                        SubsystemFactoryFunctor f,
                                        GroupType group,