diff --git a/src/x86.h b/src/x86.h
index 2ca377c86c..4ae08f6859 100644
--- a/src/x86.h
+++ b/src/x86.h
@@ -233,9 +233,9 @@ inline bool
 atomicCompareAndSwap(uintptr_t* p, uintptr_t old, uintptr_t new_)
 {
 #ifdef ARCH_x86_32
-  return atomicCompareAndSwap32(p, old, new_);
+  return atomicCompareAndSwap32(reinterpret_cast<uint32_t*>(p), old, new_);
 #elif defined ARCH_x86_64
-  return atomicCompareAndSwap64(p, old, new_);
+  return atomicCompareAndSwap64(reinterpret_cast<uint64_t*>(p), old, new_);
 #endif // ARCH_x86_64
 }
 #endif // USE_ATOMIC_OPERATIONS