diff --git a/Code/Mantid/Framework/Kernel/src/Strings.cpp b/Code/Mantid/Framework/Kernel/src/Strings.cpp
index 8d53fe7eeb9e..88a39b6b4133 100644
--- a/Code/Mantid/Framework/Kernel/src/Strings.cpp
+++ b/Code/Mantid/Framework/Kernel/src/Strings.cpp
@@ -779,7 +779,7 @@ namespace Mantid
       }
 
       template<>
-      std::string toString(const UnitLabel &value)
+      MANTID_KERNEL_DLL std::string toString(const UnitLabel &value)
       {
         return value;
       }
@@ -1194,7 +1194,6 @@ namespace Mantid
       template MANTID_KERNEL_DLL std::string toString(const std::string &value);
 
       template MANTID_KERNEL_DLL std::string toString(const std::vector<int> &value);
-      template MANTID_KERNEL_DLL std::string toString(const UnitLabel &value);
 
       // this block should generate the vector ones as well
       template MANTID_KERNEL_DLL std::string toString(const std::set<int> &value);