diff --git a/src/include/utils/trace.h b/src/include/utils/trace.h
index 3cb2d9e28f..61f0b27da1 100644
--- a/src/include/utils/trace.h
+++ b/src/include/utils/trace.h
@@ -18,7 +18,7 @@
 #ifdef ELOG_TIMESTAMPS
 char	   *tprintf_timestamp(void);
 
-#define TIMESTAMP_SIZE 28
+#define TIMESTAMP_SIZE 30
 #else
 #define TIMESTAMP_SIZE 0
 #endif