--- a/gfx/skia/src/ports/SkThread_win.cpp
+++ b/gfx/skia/src/ports/SkThread_win.cpp
@@ -31,17 +31,17 @@ int32_t sk_atomic_add(int32_t* addr, int
 
 int32_t sk_atomic_dec(int32_t* addr) {
     return _InterlockedDecrement(reinterpret_cast<LONG*>(addr)) + 1;
 }
 void sk_membar_aquire__after_atomic_dec() { }
 
 int32_t sk_atomic_conditional_inc(int32_t* addr) {
     while (true) {
-        LONG value = static_cast<LONG const volatile&>(*addr);
+        LONG value = static_cast<int32_t const volatile&>(*addr);
         if (value == 0) {
             return 0;
         }
         if (_InterlockedCompareExchange(reinterpret_cast<LONG*>(addr),
                                         value + 1,
                                         value) == value) {
             return value;
         }