diff --git a/introspection.cpp b/introspection.cpp
index 5e0c956f..d0fb43ae 100644
--- a/introspection.cpp
+++ b/introspection.cpp
@@ -32,3 +32,7 @@ constexpr char util::type_string<uint64_t>::value[];
 
 constexpr char util::type_string<float>::value[];
 constexpr char util::type_string<double>::value[];
+
+constexpr char util::type_string<std::string>::value[];
+constexpr char util::type_string<char*>::value[];
+constexpr char util::type_string<char[]>::value[];
diff --git a/introspection.hpp b/introspection.hpp
index 396ee9cc..b60a13ae 100644
--- a/introspection.hpp
+++ b/introspection.hpp
@@ -47,6 +47,10 @@ namespace util {
     template <> struct type_string<float   > { static constexpr const char value[] = "float32"; };
     template <> struct type_string<double  > { static constexpr const char value[] = "float64"; };
 
+    template <> struct type_string<std::string> { static constexpr const char value[] = "string"; };
+    template <> struct type_string<char*>       { static constexpr const char value[] = "string"; };
+    template <> struct type_string<char[]>      { static constexpr const char value[] = "string"; };
+
     template <typename T>
     auto
     to_string (void)