diff --git a/src/utils.h b/src/utils.h
index 219343b..b89f284 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -784,6 +784,9 @@
 };
 
 template <class Dest, class Source>
+INLINE(Dest BitCast(const Source& source));
+
+template <class Dest, class Source>
 inline Dest BitCast(const Source& source) {
   return BitCastHelper<Dest, Source>::cast(source);
 }