diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c
index dd3e6f43fb86..3f28af39f9c6 100644
--- a/tools/perf/util/synthetic-events.c
+++ b/tools/perf/util/synthetic-events.c
@@ -345,6 +345,7 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 			continue;
 
 		event->mmap2.ino = (u64)ino;
+		event->mmap2.ino_generation = 0;
 
 		/*
 		 * Just like the kernel, see __perf_event_mmap in kernel/perf_event.c