diff --git a/trunk/src/kernel/srs_kernel_log.hpp b/trunk/src/kernel/srs_kernel_log.hpp
index 670a5b9c6..1d7af37bb 100644
--- a/trunk/src/kernel/srs_kernel_log.hpp
+++ b/trunk/src/kernel/srs_kernel_log.hpp
@@ -142,26 +142,5 @@ extern ISrsThreadContext* _srs_context;
     #define srs_trace(msg, ...) (void)0
 #endif
 
-inline void srs_trace_data(const char* data_p, int len, const char* dscr)
-{
-    const int MAX = 256;
-    char debug_data[MAX];
-    char debug_len = 0;
-
-    debug_len += sprintf(debug_data + debug_len, "%s", dscr);
-
-    for (int index = 0; index < len; index++) {
-        if (index % 16 == 0) {
-            debug_len += sprintf(debug_data + debug_len, "\r\n");
-        }
-        debug_len += sprintf(debug_data + debug_len, " %02x", (unsigned char)data_p[index]);
-        if (index >= 32) {
-            break;
-        }
-    }
-
-    srs_trace("%s", debug_data);
-    return;
-}
 #endif