diff --git a/packages/CLPBN/clpbn/bp/Util.cpp b/packages/CLPBN/clpbn/bp/Util.cpp
index 20f33a6c7..f9890fce6 100644
--- a/packages/CLPBN/clpbn/bp/Util.cpp
+++ b/packages/CLPBN/clpbn/bp/Util.cpp
@@ -37,6 +37,17 @@ unsigned             Statistics::primaryNetCount_;
 
 namespace Util {
 
+
+template <> std::string
+toString (const bool& b)
+{
+  std::stringstream ss;
+  ss << std::boolalpha << b;
+  return ss.str();
+}
+
+
+
 void
 toLog (Params& v)
 {
diff --git a/packages/CLPBN/clpbn/bp/Util.h b/packages/CLPBN/clpbn/bp/Util.h
index 0b4d4173c..58e838d63 100644
--- a/packages/CLPBN/clpbn/bp/Util.h
+++ b/packages/CLPBN/clpbn/bp/Util.h
@@ -36,6 +36,8 @@ template <typename K, typename V> bool contains (
 
 template <typename T> std::string toString (const T&);
 
+template <> std::string toString (const bool&);
+
 void toLog (Params&);
 
 void fromLog (Params&);
@@ -312,6 +314,7 @@ void pow (Params&, double);
 };
 
 
+
 struct NetInfo
 {
   NetInfo (unsigned size, bool loopy, unsigned nIters, double time)