diff --git a/gtsam/inference/LabeledSymbol.cpp b/gtsam/inference/LabeledSymbol.cpp
index bd142a72c..b9e93ceb1 100644
--- a/gtsam/inference/LabeledSymbol.cpp
+++ b/gtsam/inference/LabeledSymbol.cpp
@@ -110,16 +110,16 @@ bool LabeledSymbol::operator!=(gtsam::Key comp) const {
 static LabeledSymbol make(gtsam::Key key) { return LabeledSymbol(key);}
 
 boost::function<bool(gtsam::Key)> LabeledSymbol::TypeTest(unsigned char c) {
-  return bind(&LabeledSymbol::chr, bind(make, _1)) == c;
+  return boost::bind(&LabeledSymbol::chr, boost::bind(make, _1)) == c;
 }
 
 boost::function<bool(gtsam::Key)> LabeledSymbol::LabelTest(unsigned char label) {
-  return bind(&LabeledSymbol::label, bind(make, _1)) == label;
+  return boost::bind(&LabeledSymbol::label, boost::bind(make, _1)) == label;
 }
 
 boost::function<bool(gtsam::Key)> LabeledSymbol::TypeLabelTest(unsigned char c, unsigned char label) {
-  return bind(&LabeledSymbol::chr,   bind(make, _1)) == c &&
-      bind(&LabeledSymbol::label, bind(make, _1)) == label;
+  return boost::bind(&LabeledSymbol::chr,   boost::bind(make, _1)) == c &&
+      boost::bind(&LabeledSymbol::label, boost::bind(make, _1)) == label;
 }
 /* ************************************************************************* */