diff --git a/src/vnet/tcp/tcp_debug.h b/src/vnet/tcp/tcp_debug.h
index 5d4f7d6..e0db7f4 100755
--- a/src/vnet/tcp/tcp_debug.h
+++ b/src/vnet/tcp/tcp_debug.h
@@ -19,7 +19,7 @@
 #include <vlib/vlib.h>
 
 #define TCP_DEBUG (1)
-#define TCP_DEBUG_SM (0)
+#define TCP_DEBUG_SM (1)
 #define TCP_DEBUG_CC (0)
 #define TCP_DEBUG_CC_STAT (1)
 #define TCP_DEBUG_BUFFER_ALLOCATION (0)