diff --git a/src/libsysprof/sysprof-perf-event-stream-private.h b/src/libsysprof/sysprof-perf-event-stream-private.h
index b25c079d..4ac0fd1e 100644
--- a/src/libsysprof/sysprof-perf-event-stream-private.h
+++ b/src/libsysprof/sysprof-perf-event-stream-private.h
@@ -132,6 +132,15 @@ typedef struct _SysprofPerfEventTracepoint
 } SysprofPerfEventTracepoint
 SYSPROF_ALIGNED_END(1);
 
+SYSPROF_ALIGNED_BEGIN(1)
+typedef struct _SysprofPerfEventLost
+{
+  struct perf_event_header header;
+  guint64 identifier;
+  guint64 lost;
+} SysprofPerfEventLost
+SYSPROF_ALIGNED_END(1);
+
 SYSPROF_ALIGNED_BEGIN(1)
 typedef union _SysprofPerfEvent
 {
@@ -143,6 +152,7 @@ typedef union _SysprofPerfEvent
   SysprofPerfEventMmap2      mmap2;
   SysprofPerfEventCallchain  callchain;
   SysprofPerfEventTracepoint tracepoint;
+  SysprofPerfEventLost       lost;
   guint8                     raw[0];
 } SysprofPerfEvent
 SYSPROF_ALIGNED_END(1);