diff --git a/mozilla/nsprpub/config/prdepend.h b/mozilla/nsprpub/config/prdepend.h
index 28c1b139d11..8bebd56b5d7 100644
--- a/mozilla/nsprpub/config/prdepend.h
+++ b/mozilla/nsprpub/config/prdepend.h
@@ -39,4 +39,3 @@
  */
 
 #error "Do not include this header file."
-
diff --git a/mozilla/nsprpub/pr/include/md/_win95.h b/mozilla/nsprpub/pr/include/md/_win95.h
index 3a71acf6798..44f3e531e44 100644
--- a/mozilla/nsprpub/pr/include/md/_win95.h
+++ b/mozilla/nsprpub/pr/include/md/_win95.h
@@ -112,6 +112,9 @@ struct _MDThread {
     struct PRThread *prev, *next;       /* used by the cvar wait queue to
                                          * chain the PRThread structures
                                          * together */
+    void (*start)(void *);              /* used by _PR_MD_CREATE_THREAD to
+                                         * pass its 'start' argument to
+                                         * pr_root. */
 };
 
 struct _MDThreadStack {
diff --git a/mozilla/nsprpub/pr/include/md/_winnt.h b/mozilla/nsprpub/pr/include/md/_winnt.h
index 6dcc991bf04..1e7fe6d31a9 100644
--- a/mozilla/nsprpub/pr/include/md/_winnt.h
+++ b/mozilla/nsprpub/pr/include/md/_winnt.h
@@ -172,6 +172,9 @@ struct _MDThread {
     void            *fiber_arg;         /* arg to main fiber routine */
     PRUint32         fiber_stacksize;   /* stacksize for fiber */
     PRInt32          fiber_last_error;  /* last error for the fiber */
+    void (*start)(void *);              /* used by _PR_MD_CREATE_THREAD to
+                                         * pass its 'start' argument to
+                                         * pr_root. */
 };
 
 struct _MDThreadStack {
diff --git a/mozilla/nsprpub/pr/src/md/windows/ntthread.c b/mozilla/nsprpub/pr/src/md/windows/ntthread.c
index a414e5c7871..0e7ef6e00a7 100644
--- a/mozilla/nsprpub/pr/src/md/windows/ntthread.c
+++ b/mozilla/nsprpub/pr/src/md/windows/ntthread.c
@@ -191,6 +191,14 @@ _PR_MD_INIT_THREAD(PRThread *thread)
     return PR_SUCCESS;
 }
 
+static unsigned __stdcall
+pr_root(void *arg)
+{
+    PRThread *thread = (PRThread *)arg;
+    thread->md.start(thread);
+    return 0;
+}
+
 PRStatus 
 _PR_MD_CREATE_THREAD(PRThread *thread, 
                   void (*start)(void *), 
@@ -200,23 +208,14 @@ _PR_MD_CREATE_THREAD(PRThread *thread,
                   PRUint32 stackSize)
 {
 
-#if 0
-    thread->md.handle = CreateThread(
-                    NULL,                             /* security attrib */
-                    thread->stack->stackSize,         /* stack size      */
-                    (LPTHREAD_START_ROUTINE)start,    /* startup routine */
-                    (void *)thread,                   /* thread param    */
-                    CREATE_SUSPENDED,                 /* create flags    */
-                    &(thread->id) );                  /* thread id       */
-#else
+    thread->md.start = start;
     thread->md.handle = (HANDLE) _beginthreadex(
                     NULL,
                     thread->stack->stackSize,
-                    (unsigned (__stdcall *)(void *))start,
+                    pr_root,
                     (void *)thread,
                     CREATE_SUSPENDED,
                     &(thread->id));
-#endif
     if(!thread->md.handle) {
         PRErrorCode prerror;
         thread->md.fiber_last_error = GetLastError();
diff --git a/mozilla/nsprpub/pr/src/md/windows/w95thred.c b/mozilla/nsprpub/pr/src/md/windows/w95thred.c
index f8a70043c50..f2519f421c3 100644
--- a/mozilla/nsprpub/pr/src/md/windows/w95thred.c
+++ b/mozilla/nsprpub/pr/src/md/windows/w95thred.c
@@ -106,6 +106,14 @@ _PR_MD_INIT_THREAD(PRThread *thread)
 		return PR_SUCCESS;
 }
 
+static unsigned __stdcall
+pr_root(void *arg)
+{
+    PRThread *thread = (PRThread *)arg;
+    thread->md.start(thread);
+    return 0;
+}
+
 PRStatus 
 _PR_MD_CREATE_THREAD(PRThread *thread, 
                   void (*start)(void *), 
@@ -115,14 +123,11 @@ _PR_MD_CREATE_THREAD(PRThread *thread,
                   PRUint32 stackSize)
 {
 
+    thread->md.start = start;
     thread->md.handle = (HANDLE) _beginthreadex(
                     NULL,
                     thread->stack->stackSize,
-#if defined(__MINGW32__)
-                    (void *)start,
-#else
-                    (unsigned (__stdcall *)(void *))start,
-#endif
+                    pr_root,
                     (void *)thread,
                     CREATE_SUSPENDED,
                     &(thread->id));