diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index b2cfec55f..a5fd507bf 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -133,7 +133,6 @@ using namespace _srs_internal;
 #define SRS_CONF_DEFAULT_TRANSCODE_IFORMAT "flv"
 #define SRS_CONF_DEFAULT_TRANSCODE_OFORMAT "flv"
 
-#define SRS_CONF_DEFAULT_EDGE_MODE false
 #define SRS_CONF_DEFAULT_EDGE_TOKEN_TRAVERSE false
 #define SRS_CONF_DEFAULT_EDGE_TRANSFORM_VHOST "[vhost]"
 
@@ -2743,17 +2742,18 @@ bool SrsConfig::get_vhost_is_edge(string vhost)
 
 bool SrsConfig::get_vhost_is_edge(SrsConfDirective* vhost)
 {
+    static bool DEFAULT = false;
     SrsConfDirective* conf = vhost;
-    
+
     if (!conf) {
-        return SRS_CONF_DEFAULT_EDGE_MODE;
+        return DEFAULT;
     }
-    
+
     conf = conf->get("mode");
     if (!conf || conf->arg0().empty()) {
-        return SRS_CONF_DEFAULT_EDGE_MODE;
+        return DEFAULT;
     }
-    
+
     return "remote" == conf->arg0();
 }
 
diff --git a/trunk/src/protocol/srs_protocol_buffer.cpp b/trunk/src/protocol/srs_protocol_buffer.cpp
old mode 100644
new mode 100755
index 9efa26d78..468f73d1e
--- a/trunk/src/protocol/srs_protocol_buffer.cpp
+++ b/trunk/src/protocol/srs_protocol_buffer.cpp
@@ -114,8 +114,9 @@ char SrsFastBuffer::read_1byte()
 
 char* SrsFastBuffer::read_slice(int size)
 {
+    srs_assert(size >= 0);
     srs_assert(end - p >= size);
-    srs_assert(p + size > buffer);
+    srs_assert(p + size >= buffer);
     
     char* ptr = p;
     p += size;
@@ -126,7 +127,7 @@ char* SrsFastBuffer::read_slice(int size)
 void SrsFastBuffer::skip(int size)
 {
     srs_assert(end - p >= size);
-    srs_assert(p + size > buffer);
+    srs_assert(p + size >= buffer);
     p += size;
 }