diff --git a/include/boost/atomic/detail/gcc-x86.hpp b/include/boost/atomic/detail/gcc-x86.hpp
index a1c9867..ea3d651 100644
--- a/include/boost/atomic/detail/gcc-x86.hpp
+++ b/include/boost/atomic/detail/gcc-x86.hpp
@@ -1556,11 +1556,11 @@ platform_store64(T value, volatile T * ptr)
 
 template<typename T>
 T
-platform_load64(volatile T * ptr)
+platform_load64(const volatile T * ptr)
 {
     T expected = *ptr;
     do {
-    } while (!platform_cmpxchg64_strong(expected, expected, ptr));
+    } while (!platform_cmpxchg64_strong(expected, expected, const_cast<volatile T*>(ptr)));
     return expected;
 }