--- lib/util/nssilckt.h~
+++ lib/util/nssilckt.h
@@ -195,7 +195,7 @@ typedef enum  {
 ** Declare the trace record
 */
 struct pzTrace_s {
-    PRUint32        threadID; /* PR_GetThreadID() */
+    pthread_t       threadID; /* PR_GetThreadID() */
     nssILockOp      op;       /* operation being performed */
     nssILockType    ltype;    /* lock type identifier */
     PRIntervalTime  callTime; /* time spent in function */