diff --git a/include/cppad/local/cppad_colpack.hpp b/include/cppad/local/cppad_colpack.hpp
index ee96ab5fe..6dd022180 100644
--- a/include/cppad/local/cppad_colpack.hpp
+++ b/include/cppad/local/cppad_colpack.hpp
@@ -59,7 +59,7 @@ it is not the case that both
 This routine tries to minimize, with respect to the choice of colors,
 the number of colors.
 */
-extern void cppad_colpack_general(
+CPPAD_LIB_EXPORT void cppad_colpack_general(
           CppAD::vector<size_t>&         color         ,
     size_t                               m             ,
     size_t                               n             ,
@@ -91,7 +91,7 @@ The properties of this coloring have not yet been determined; see
 Efficient Computation of Sparse Hessians Using Coloring
 and Automatic Differentiation (pdf/ad/gebemedhin14.pdf)
 */
-extern void cppad_colpack_symmetric(
+CPPAD_LIB_EXPORT void cppad_colpack_symmetric(
           CppAD::vector<size_t>&         color         ,
     size_t                               n             ,
     const CppAD::vector<unsigned int*>&  adolc_pattern
diff --git a/include/cppad/local/graph/json_parser.hpp b/include/cppad/local/graph/json_parser.hpp
index 17bcc7c7e..a28d2c045 100644
--- a/include/cppad/local/graph/json_parser.hpp
+++ b/include/cppad/local/graph/json_parser.hpp
@@ -42,7 +42,7 @@ Upon return it is a $cref cpp_ad_graph$$ representation of this function.
 $head Prototype$$
 $srccode%hpp% */
 namespace CppAD { namespace local { namespace graph {
-    void json_parser(
+    CPPAD_LIB_EXPORT void json_parser(
         const std::string&  json      ,
         cpp_graph&          graph_obj
     );
diff --git a/include/cppad/local/graph/json_writer.hpp b/include/cppad/local/graph/json_writer.hpp
index 36a4cb39f..299c56cc0 100644
--- a/include/cppad/local/graph/json_writer.hpp
+++ b/include/cppad/local/graph/json_writer.hpp
@@ -41,7 +41,7 @@ This is a $code cpp_graph$$ object.
 $head Prototype$$
 $srccode%hpp% */
 namespace CppAD { namespace local { namespace graph {
-    void json_writer(
+    CPPAD_LIB_EXPORT void json_writer(
         std::string&       json        ,
         const cpp_graph&   graph_obj
     );