diff --git a/plugin/protocol/http2/include/internal/http2_common.h b/plugin/protocol/http2/include/internal/http2_common.h
index 5aba7df..79ed3de 100644
--- a/plugin/protocol/http2/include/internal/http2_common.h
+++ b/plugin/protocol/http2/include/internal/http2_common.h
@@ -52,7 +52,7 @@ str_to_val(const char *val, const struct value_string *vs);
 const char*
 http2_header_val_to_str(unsigned int val, const char * map[], unsigned int map_size);
 int
-http2_header_str_to_val(const char *str, const char * map[], unsigned int map_size);
+http2_header_str_to_val(const char *str, size_t slen, const char * map[], unsigned int map_size);
 
 #define BV(x) (1 << x)
 #define HTTP2_CONTENT_ENCODING_NONE					0
diff --git a/plugin/protocol/http2/src/http2_common.cpp b/plugin/protocol/http2/src/http2_common.cpp
index f4b7007..b8b2a2c 100644
--- a/plugin/protocol/http2/src/http2_common.cpp
+++ b/plugin/protocol/http2/src/http2_common.cpp
@@ -36,11 +36,13 @@ Http2Plugin *http2_plugin()
 }
 
 int
-http2_header_str_to_val(const char *str, const char * map[], unsigned int map_size)
+http2_header_str_to_val(const char *str, size_t slen, const char * map[], unsigned int map_size)
 {
+	size_t normlen = 0;
 	for (unsigned int i = 2; i < map_size; i++)
 	{
-		if ( (strlen(str) == strlen(map[i])) && !strncasecmp(str, map[i], strlen(map[i])))
+		normlen = strlen(map[i]);
+		if ( (slen == normlen) && !strncasecmp(str, map[i], normlen))
 		{
 			return i;
 		}
@@ -48,7 +50,8 @@ http2_header_str_to_val(const char *str, const char * map[], unsigned int map_si
 
 	// in http  [TFE_HTTP_UNKNOWN_FIELD] = NULL;      [TFE_HTTP_HOST] = "Host",
 	// in http2 [TFE_HTTP_UNKNOWN_FIELD] = "unknown"; [TFE_HTTP_HOST] = ":authority"
-	if ( (strlen(str) == strlen(":authority")) && !strncasecmp(str, ":authority", strlen(":authority")))
+	normlen = strlen(":authority");
+	if ( (slen == normlen) && !strncasecmp(str, ":authority", normlen))
 	{
 		return TFE_HTTP_HOST;
 	} else {
diff --git a/plugin/protocol/http2/src/http2_stream.cpp b/plugin/protocol/http2/src/http2_stream.cpp
index 2f88dba..29f8c69 100644
--- a/plugin/protocol/http2/src/http2_stream.cpp
+++ b/plugin/protocol/http2/src/http2_stream.cpp
@@ -1872,7 +1872,8 @@ nghttp2_fill_up_header(nghttp2_session *ngh2_session, const nghttp2_frame *frame
 	struct tfe_h2_half_private *half = (dir == CONN_DIR_UPSTREAM) ? h2_session->resp : h2_session->req;
 
 	struct http_field_name field;
-	field.field_id = (enum tfe_http_std_field)http2_header_str_to_val((const char *)name, __str_std_header_field_map, __str_std_header_field_map_size);
+	// "name" may not terminated with '\0',  so use "namelen"
+	field.field_id = (enum tfe_http_std_field)http2_header_str_to_val((const char *)name, namelen, __str_std_header_field_map, __str_std_header_field_map_size);
 	if (field.field_id == TFE_HTTP_UNKNOWN_FIELD)
 	{
 		field.field_name = (const char *)name;
@@ -1906,7 +1907,8 @@ nghttp2_fill_up_promise(nghttp2_session *ngh2_session, const nghttp2_frame *fram
     }
 	resp = h2_session->resp;
 	struct http_field_name field;
-	field.field_id = (enum tfe_http_std_field)http2_header_str_to_val((const char *)name, __str_std_header_field_map, __str_std_header_field_map_size);
+	// "name" may not terminated with '\0',  so use "namelen"
+	field.field_id = (enum tfe_http_std_field)http2_header_str_to_val((const char *)name, namelen, __str_std_header_field_map, __str_std_header_field_map_size);
 	if (field.field_id == TFE_HTTP_UNKNOWN_FIELD)
 	{
 		field.field_name = (const char *)name;