diff --git a/cmds/atrace/atrace.cpp b/cmds/atrace/atrace.cpp
index 34dc9fef8..3461e3877 100644
--- a/cmds/atrace/atrace.cpp
+++ b/cmds/atrace/atrace.cpp
@@ -84,6 +84,7 @@ static const TracingCategory k_categories[] = {
     { "res",        "Resource Loading", ATRACE_TAG_RESOURCES, { } },
     { "dalvik",     "Dalvik VM",        ATRACE_TAG_DALVIK, { } },
     { "rs",         "RenderScript",     ATRACE_TAG_RS, { } },
+    { "bionic",     "Bionic C Library", ATRACE_TAG_BIONIC, { } },
     { "sched",      "CPU Scheduling",   0, {
         { REQ,      "/sys/kernel/debug/tracing/events/sched/sched_switch/enable" },
         { REQ,      "/sys/kernel/debug/tracing/events/sched/sched_wakeup/enable" },