diff --git a/src/perf_file_format.cpp b/src/perf_file_format.cpp
index dbca74b4cef0422ad616b87dc7b7705146a8c91b..21020de8ca8a9dc55845d519386a1cdb6a47b0e9 100755
--- a/src/perf_file_format.cpp
+++ b/src/perf_file_format.cpp
@@ -384,7 +384,7 @@ PerfFileSectionEventDesc::PerfFileSectionEventDesc(FEATURE id,
 PerfFileSectionEventDesc::PerfFileSectionEventDesc(FEATURE id, const char *buf, size_t size)
     : PerfFileSection(id)
 {
-    constexpr uint32_t maxIds = 50;
+    constexpr uint32_t maxIds = 500;
     Init(buf, size);
     uint32_t nr = 0;
     if (!Read(nr)) {