diff --git a/std/experimental/allocator/gc_allocator.d b/std/experimental/allocator/gc_allocator.d
index f3673e5549f..41894568f03 100644
--- a/std/experimental/allocator/gc_allocator.d
+++ b/std/experimental/allocator/gc_allocator.d
@@ -73,7 +73,7 @@ struct GCAllocator
     pure nothrow
     Ternary resolveInternalPointer(const void* p, ref void[] result) shared
     {
-        auto r = GC.addrOf(cast(void*)p);
+        auto r = GC.addrOf(cast(void*) p);
         if (!r) return Ternary.no;
         result = r[0 .. GC.sizeOf(r)];
         return Ternary.yes;