diff --git a/src/libexpr/value.hh b/src/libexpr/value.hh
index 9cf2bf06a..71025824e 100644
--- a/src/libexpr/value.hh
+++ b/src/libexpr/value.hh
@@ -253,8 +253,8 @@ void mkPath(Value & v, const char * s);
 
 
 #if HAVE_BOEHMGC
-typedef std::vector<Value *, gc_allocator<Value *> > ValueVector;
-typedef std::map<Symbol, Value *, std::less<Symbol>, gc_allocator<std::pair<const Symbol, Value *> > > ValueMap;
+typedef std::vector<Value *, traceable_allocator<Value *> > ValueVector;
+typedef std::map<Symbol, Value *, std::less<Symbol>, traceable_allocator<std::pair<const Symbol, Value *> > > ValueMap;
 #else
 typedef std::vector<Value *> ValueVector;
 typedef std::map<Symbol, Value *> ValueMap;