diff --git a/include/boost/math/optimization/detail/differentiable_opt_utilties.hpp b/include/boost/math/optimization/detail/differentiable_opt_utilties.hpp
index 48e80ae71..bd245164a 100644
--- a/include/boost/math/optimization/detail/differentiable_opt_utilties.hpp
+++ b/include/boost/math/optimization/detail/differentiable_opt_utilties.hpp
@@ -101,7 +101,7 @@ template<typename T>
 T
 norm_inf(const std::vector<T>& x)
 {
-  assert(!x.empty());
+  BOOST_ASSERT(!x.empty());
 
   T max_val = std::abs(x[0]);
   const std::size_t n = x.size();
diff --git a/include/boost/math/optimization/detail/line_search_policies.hpp b/include/boost/math/optimization/detail/line_search_policies.hpp
index a64254a9a..409550f10 100644
--- a/include/boost/math/optimization/detail/line_search_policies.hpp
+++ b/include/boost/math/optimization/detail/line_search_policies.hpp
@@ -85,7 +85,7 @@ public:
  *  Numerical Optimization, 2nd Edition,
  *  Springer, 2006.
  *
- *  Algorithm 3.5 — Line Search Algorithm (Strong Wolfe Conditions)
+ *  Algorithm 3.5 - Line Search Algorithm (Strong Wolfe Conditions)
  *  Pages 60–61
  */
 template<typename RealType>
diff --git a/include/boost/math/optimization/lbfgs.hpp b/include/boost/math/optimization/lbfgs.hpp
index 0c18fdb48..73a8f56f8 100644
--- a/include/boost/math/optimization/lbfgs.hpp
+++ b/include/boost/math/optimization/lbfgs.hpp
@@ -10,6 +10,7 @@
 #include <vector>
 
 #include "boost/math/optimization/detail/line_search_policies.hpp"
+#include <deque>
 
 namespace boost {
 namespace math {