diff --git a/llvm/tools/llvm-cov/CoverageExporterJson.cpp b/llvm/tools/llvm-cov/CoverageExporterJson.cpp
--- a/llvm/tools/llvm-cov/CoverageExporterJson.cpp
+++ b/llvm/tools/llvm-cov/CoverageExporterJson.cpp
@@ -73,7 +73,7 @@
 
 json::Array renderSegment(const coverage::CoverageSegment &Segment) {
   return json::Array({Segment.Line, Segment.Col, clamp_uint64_to_int64(Segment.Count),
-                      Segment.HasCount, Segment.IsRegionEntry});
+                      Segment.HasCount, Segment.IsRegionEntry, Segment.IsGapRegion});
 }
 
 json::Array renderRegion(const coverage::CountedRegion &Region) {