diff --git a/gtsam/base/FastMap.h b/gtsam/base/FastMap.h
index 084919427..0a76c08b0 100644
--- a/gtsam/base/FastMap.h
+++ b/gtsam/base/FastMap.h
@@ -61,7 +61,8 @@ public:
   }
 
   /** Handy 'insert' function for Matlab wrapper */
-  bool insert2(const KEY& key, const VALUE& val) { return Base::insert(std::make_pair<KEY,VALUE>(key, val)).second; }
+  bool insert2(const KEY& key, const VALUE& val) { return Base::insert(std::make_pair(key, val)).second; }
+
   /** Handy 'exists' function */
   bool exists(const KEY& e) const { return this->find(e) != this->end(); }