diff --git a/include/dynalo/detail/windows/dynalo.hpp b/include/dynalo/detail/windows/dynalo.hpp
index dbf9a56..c4eea6d 100644
--- a/include/dynalo/detail/windows/dynalo.hpp
+++ b/include/dynalo/detail/windows/dynalo.hpp
@@ -8,7 +8,7 @@
 
 namespace dynalo { namespace detail
 {
-
+inline
 std::string last_error()
 {
     // https://msdn.microsoft.com/en-us/library/ms680582%28VS.85%29.aspx