diff --git a/lib/includes/nghttp2/nghttp2.h b/lib/includes/nghttp2/nghttp2.h
index 8680860b..5d080b1d 100644
--- a/lib/includes/nghttp2/nghttp2.h
+++ b/lib/includes/nghttp2/nghttp2.h
@@ -45,6 +45,13 @@ struct nghttp2_session;
  */
 typedef struct nghttp2_session nghttp2_session;
 
+/**
+ * @macro
+ * default priority value
+ */
+#define NGHTTP2_PRI_DEFAULT (1 << 30)
+#define NGHTTP2_PRI_LOWEST ((1U << 31) - 1)
+
 /**
  * @enum
  *
diff --git a/lib/nghttp2_frame.h b/lib/nghttp2_frame.h
index d92a1c8f..a5c03dbc 100644
--- a/lib/nghttp2_frame.h
+++ b/lib/nghttp2_frame.h
@@ -33,13 +33,6 @@
 #include "nghttp2_hd.h"
 #include "nghttp2_buffer.h"
 
-/**
- * @macro
- * default priority value
- */
-#define NGHTTP2_PRI_DEFAULT (1 << 30)
-#define NGHTTP2_PRI_LOWEST ((1U << 31) - 1)
-
 #define NGHTTP2_MAX_FRAME_SIZE ((1 << 16) - 1)
 
 #define NGHTTP2_STREAM_ID_MASK 0x7fffffff
diff --git a/src/nghttp2_ssl.cc b/src/nghttp2_ssl.cc
index 8d8f910d..9af339c0 100644
--- a/src/nghttp2_ssl.cc
+++ b/src/nghttp2_ssl.cc
@@ -142,7 +142,7 @@ int Spdylay::submit_request(const std::string& scheme,
                             const std::string& hostport,
                             const std::string& path,
                             const std::map<std::string,std::string> &headers,
-                            uint8_t pri,
+                            int32_t pri,
                             const nghttp2_data_provider *data_prd,
                             int64_t data_length,
                             void *stream_user_data)
diff --git a/src/nghttp2_ssl.h b/src/nghttp2_ssl.h
index 611dc522..37467194 100644
--- a/src/nghttp2_ssl.h
+++ b/src/nghttp2_ssl.h
@@ -58,7 +58,7 @@ public:
   int submit_request(const std::string& scheme,
                      const std::string& hostport, const std::string& path,
                      const std::map<std::string,std::string>& headers,
-                     uint8_t pri,
+                     int32_t pri,
                      const nghttp2_data_provider *data_prd,
                      int64_t data_length,
                      void *stream_user_data);
diff --git a/src/spdycat.cc b/src/spdycat.cc
index 8962f89d..0a89c105 100644
--- a/src/spdycat.cc
+++ b/src/spdycat.cc
@@ -373,7 +373,8 @@ void submit_request(Spdylay& sc, const std::string& hostport,
 {
   std::string path = req->make_reqpath();
   int r = sc.submit_request(get_uri_field(req->uri.c_str(), req->u, UF_SCHEMA),
-                            hostport, path, headers, 3, req->data_prd,
+                            hostport, path, headers,
+                            NGHTTP2_PRI_DEFAULT, req->data_prd,
                             req->data_length, req);
   assert(r == 0);
 }