diff --git a/include/backtrace/backtrace.h b/include/backtrace/backtrace.h
index 186d327..fa81f21 100644
--- a/include/backtrace/backtrace.h
+++ b/include/backtrace/backtrace.h
@@ -28,8 +28,8 @@
 // thread from the current process will be traced.
 #define BACKTRACE_CURRENT_PROCESS -1
 // When the tid to be traced is set to this value, then trace the specified
-// pid.
-#define BACKTRACE_NO_TID -1
+// current thread of the specified pid.
+#define BACKTRACE_CURRENT_THREAD -1
 
 #define MAX_BACKTRACE_FRAMES 64
 
diff --git a/include/utils/CallStack.h b/include/utils/CallStack.h
index 5836037..bfe2ddb 100644
--- a/include/utils/CallStack.h
+++ b/include/utils/CallStack.h
@@ -44,7 +44,7 @@
 
     // Immediately collect the stack traces for the specified thread.
     // The default is to dump the stack of the current call.
-    void update(int32_t ignoreDepth=1, pid_t tid=BACKTRACE_NO_TID);
+    void update(int32_t ignoreDepth=1, pid_t tid=BACKTRACE_CURRENT_THREAD);
 
     // Dump a stack trace to the log using the supplied logtag.
     void log(const char* logtag,