diff --git a/scripts/tracetool/format/events_c.py b/scripts/tracetool/format/events_c.py
index 88175559de..a976c22c8b 100644
--- a/scripts/tracetool/format/events_c.py
+++ b/scripts/tracetool/format/events_c.py
@@ -28,25 +28,19 @@ def generate(events, backend):
     for e in events:
         out('uint16_t %s;' % e.api(e.QEMU_DSTATE))
 
-    next_id = 0
-    next_vcpu_id = 0
     for e in events:
-        id = next_id
-        next_id += 1
         if "vcpu" in e.properties:
-            vcpu_id = next_vcpu_id
-            next_vcpu_id += 1
+            vcpu_id = 0
         else:
             vcpu_id = "TRACE_VCPU_EVENT_NONE"
         out('TraceEvent %(event)s = {',
-            '    .id = %(id)s,',
+            '    .id = 0,',
             '    .vcpu_id = %(vcpu_id)s,',
             '    .name = \"%(name)s\",',
             '    .sstate = %(sstate)s,',
             '    .dstate = &%(dstate)s ',
             '};',
             event = e.api(e.QEMU_EVENT),
-            id = id,
             vcpu_id = vcpu_id,
             name = e.name,
             sstate = "TRACE_%s_ENABLED" % e.name.upper(),
diff --git a/scripts/tracetool/format/events_h.py b/scripts/tracetool/format/events_h.py
index ca6d730519..1cb332befc 100644
--- a/scripts/tracetool/format/events_h.py
+++ b/scripts/tracetool/format/events_h.py
@@ -32,10 +32,6 @@ def generate(events, backend):
     for e in events:
         out('extern uint16_t %s;' % e.api(e.QEMU_DSTATE))
 
-    numvcpu = len([e for e in events if "vcpu" in e.properties])
-
-    out("#define TRACE_VCPU_EVENT_COUNT %d" % numvcpu)
-
     # static state
     for e in events:
         if 'disable' in e.properties:
diff --git a/trace/control.c b/trace/control.c
index 5f10e2d96e..1a7bee6ddc 100644
--- a/trace/control.c
+++ b/trace/control.c
@@ -35,6 +35,8 @@ typedef struct TraceEventGroup {
 
 static TraceEventGroup *event_groups;
 static size_t nevent_groups;
+static uint32_t next_id;
+static uint32_t next_vcpu_id;
 
 QemuOptsList qemu_trace_opts = {
     .name = "trace",
@@ -59,6 +61,13 @@ QemuOptsList qemu_trace_opts = {
 
 void trace_event_register_group(TraceEvent **events)
 {
+    size_t i;
+    for (i = 0; events[i] != NULL; i++) {
+        events[i]->id = next_id++;
+        if (events[i]->vcpu_id != TRACE_VCPU_EVENT_NONE) {
+            events[i]->vcpu_id = next_vcpu_id++;
+        }
+    }
     event_groups = g_renew(TraceEventGroup, event_groups, nevent_groups + 1);
     event_groups[nevent_groups].events = events;
     nevent_groups++;
@@ -293,5 +302,5 @@ char *trace_opt_parse(const char *optarg)
 
 uint32_t trace_get_vcpu_event_count(void)
 {
-    return TRACE_VCPU_EVENT_COUNT;
+    return next_vcpu_id;
 }