diff --git a/src/lib/idi/entry-id.hpp b/src/lib/idi/entry-id.hpp
index 8a860a9c5..5da10074f 100644
--- a/src/lib/idi/entry-id.hpp
+++ b/src/lib/idi/entry-id.hpp
@@ -265,7 +265,7 @@ namespace idi {
           return static_cast<EntryID const&> (bID);
         }
       
-      
+      explicit
       operator string()  const;
       
       friend bool operator<  (EntryID const& i1, EntryID const& i2) { return i1.getSym()  < i2.getSym(); }
diff --git a/tests/core/proc/asset/basicpipetest.cpp b/tests/core/proc/asset/basicpipetest.cpp
index 0947d2f6e..f0bf2126b 100644
--- a/tests/core/proc/asset/basicpipetest.cpp
+++ b/tests/core/proc/asset/basicpipetest.cpp
@@ -96,7 +96,7 @@ namespace test  {
           Asset::Ident idi = thePipe->ident;
           CHECK (idi.org == "lumi");
           CHECK (contains (idi.name, thePipe->getPipeID()));
-          CHECK (contains (idi.name, thePipe->getStreamID()));
+          CHECK (contains (idi.name, string{thePipe->getStreamID()}));
           
           Category cat{idi.category};
           Category refcat{STRUCT,"pipes"};
@@ -146,7 +146,7 @@ namespace test  {
           pipe2 = asset::Struct::retrieve (Query<Pipe>{"pipe(default)"});
           CHECK (pipe2 == pipe1);
           
-          string sID = pipe1->getStreamID(); // sort of a "default stream type"
+          auto sID = string{pipe1->getStreamID()}; // sort of a "default stream type"
           PPipe pipe3 = Pipe::query ("stream("+sID+")");
           CHECK (pipe3);
           CHECK (pipe3->getStreamID() == StreamType::ID{sID});