diff --git a/mozilla/nsprpub/pr/include/pratom.h b/mozilla/nsprpub/pr/include/pratom.h
index 1c18a9f1e3f..7096be27dbd 100644
--- a/mozilla/nsprpub/pr/include/pratom.h
+++ b/mozilla/nsprpub/pr/include/pratom.h
@@ -125,10 +125,12 @@ long __cdecl _InterlockedExchange(long volatile *Target, long Value);
 long __cdecl _InterlockedExchangeAdd(long volatile *Addend, long Value);
 #pragma intrinsic(_InterlockedExchangeAdd)
 
-#define PR_ATOMIC_INCREMENT(val) _InterlockedIncrement(val)
-#define PR_ATOMIC_DECREMENT(val) _InterlockedDecrement(val)
-#define PR_ATOMIC_SET(val, newval) _InterlockedExchange(val, newval)
-#define PR_ATOMIC_ADD(ptr, val) (_InterlockedExchangeAdd(ptr, val) + (val))
+#define PR_ATOMIC_INCREMENT(val) _InterlockedIncrement((long volatile *)(val))
+#define PR_ATOMIC_DECREMENT(val) _InterlockedDecrement((long volatile *)(val))
+#define PR_ATOMIC_SET(val, newval) \
+        _InterlockedExchange((long volatile *)(val), (long)(newval))
+#define PR_ATOMIC_ADD(ptr, val) \
+        (_InterlockedExchangeAdd((long volatile *)(ptr), (long)(val)) + (val))
 
 #elif ((__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 1)) && \
       ((defined(DARWIN) && \