diff --git a/include/turtle/matcher.hpp b/include/turtle/matcher.hpp
index 7854d77..fc20a22 100644
--- a/include/turtle/matcher.hpp
+++ b/include/turtle/matcher.hpp
@@ -39,7 +39,12 @@ class matcher<const char*, const char*>
 {
 public:
     explicit matcher(const char* expected) : expected_(expected) {}
-    bool operator()(const char* actual) { return std::strcmp(actual, expected_) == 0; }
+    bool operator()(const char* actual)
+    {
+        if (nullptr == actual || nullptr == expected_)
+            return actual == expected_;
+        return std::strcmp(actual, expected_) == 0;
+    }
     friend std::ostream& operator<<(std::ostream& s, const matcher& m) { return s << mock::format(m.expected_); }
 
 private:
diff --git a/include/turtle/stream.hpp b/include/turtle/stream.hpp
index 52991ed..e3bf273 100644
--- a/include/turtle/stream.hpp
+++ b/include/turtle/stream.hpp
@@ -106,7 +106,13 @@ namespace detail {
     {
         s << '"' << str << '"';
     }
-    inline void serialize(stream& s, const char* const str) { s << '"' << str << '"'; }
+    inline void serialize(stream& s, const char* const str)
+    {
+        if (nullptr != str)
+            s << '"' << str << '"';
+        else
+            s << "nullptr";
+    }
     inline void serialize(stream& s, unsigned char c) { s << static_cast<int>(c); }
 } // namespace detail
 } // namespace mock