diff --git a/lib/sources/sp-perf-counter.h b/lib/sources/sp-perf-counter.h
index 213aff3c..a473b3dd 100644
--- a/lib/sources/sp-perf-counter.h
+++ b/lib/sources/sp-perf-counter.h
@@ -81,6 +81,7 @@ typedef struct
 typedef struct
 {
   struct perf_event_header header;
+  guint64 identifier;
   guint64 ip;
   guint32 pid;
   guint32 tid;
diff --git a/lib/sources/sp-perf-source.c b/lib/sources/sp-perf-source.c
index a7da6cc7..b762c244 100644
--- a/lib/sources/sp-perf-source.c
+++ b/lib/sources/sp-perf-source.c
@@ -291,6 +291,7 @@ sp_perf_source_start_pid (SpPerfSource  *self,
 
   attr.sample_type = PERF_SAMPLE_IP
                    | PERF_SAMPLE_TID
+                   | PERF_SAMPLE_IDENTIFIER
                    | PERF_SAMPLE_CALLCHAIN
                    | PERF_SAMPLE_TIME;
   attr.wakeup_events = N_WAKEUP_EVENTS;