diff --git a/f8/utils.h b/f8/utils.h
index ddf2890..6d03d4f 100644
--- a/f8/utils.h
+++ b/f8/utils.h
@@ -32,7 +32,7 @@ namespace f8
                 if (field.subtype != a8::reflect::EST_SIMPLE) {
                     abort();
                 }
-                void* p = (void*)obj + field.offset;
+                void* p = (char*)obj + field.offset;
                 switch (field.type) {
                 case a8::reflect::ET_INT32:
                     {