diff --git a/src/http2.cc b/src/http2.cc
index 092c4c8e..8b82dcca 100644
--- a/src/http2.cc
+++ b/src/http2.cc
@@ -302,13 +302,6 @@ const Headers::value_type *get_header(const Headers &nva, const char *name) {
   return res;
 }
 
-std::string value_to_str(const HeaderRefs::value_type *nv) {
-  if (nv) {
-    return nv->value.str();
-  }
-  return "";
-}
-
 bool non_empty_value(const HeaderRefs::value_type *nv) {
   return nv && !nv->value.empty();
 }
diff --git a/src/http2.h b/src/http2.h
index 0ae9d3b3..8ea2f91c 100644
--- a/src/http2.h
+++ b/src/http2.h
@@ -127,9 +127,6 @@ void add_header(Headers &nva, const uint8_t *name, size_t namelen,
 // in |nva| is returned.  If no such entry exist, returns nullptr.
 const Headers::value_type *get_header(const Headers &nva, const char *name);
 
-// Returns nv->second if nv is not nullptr. Otherwise, returns "".
-std::string value_to_str(const HeaderRefs::value_type *nv);
-
 // Returns true if the value of |nv| is not empty.
 bool non_empty_value(const HeaderRefs::value_type *nv);