diff --git a/trunk/src/kernel/srs_kernel_mp4.hpp b/trunk/src/kernel/srs_kernel_mp4.hpp
index db43df771..b39ca1fff 100644
--- a/trunk/src/kernel/srs_kernel_mp4.hpp
+++ b/trunk/src/kernel/srs_kernel_mp4.hpp
@@ -866,7 +866,7 @@ public:
 
 // 8.6.6 Edit List Box
 // ISO_IEC_14496-12-base-format-2012.pdf, page 55
-// LCOV_EXCL_LINE
+// LCOV_EXCL_START
 class SrsMp4ElstEntry
 {
 public:
@@ -891,6 +891,7 @@ public:
     virtual std::stringstream& dumps(std::stringstream& ss, SrsMp4DumpContext dc);
     virtual std::stringstream& dumps_detail(std::stringstream& ss, SrsMp4DumpContext dc);
 };
+// LCOV_EXCL_STOP
 
 // 8.6.6 Edit List Box (elst)
 // ISO_IEC_14496-12-base-format-2012.pdf, page 54
@@ -1565,7 +1566,7 @@ public:
 
 // 8.6.1.3 Composition Time to Sample Box (ctts), for Video.
 // ISO_IEC_14496-12-base-format-2012.pdf, page 49
-// LCOV_EXCL_LINE
+// LCOV_EXCL_START
 class SrsMp4CttsEntry
 {
 public:
@@ -1582,6 +1583,7 @@ public:
 public:
     virtual std::stringstream& dumps_detail(std::stringstream& ss, SrsMp4DumpContext dc);
 };
+// LCOV_EXCL_STOP
 
 // 8.6.1.3 Composition Time to Sample Box (ctts), for Video.
 // ISO_IEC_14496-12-base-format-2012.pdf, page 49