diff --git a/dlls/oledb32/convert.c b/dlls/oledb32/convert.c
index f4002fbd714..1cce07aeaa6 100644
--- a/dlls/oledb32/convert.c
+++ b/dlls/oledb32/convert.c
@@ -1074,7 +1074,7 @@ static HRESULT WINAPI convert_GetConversionSize(IDataConvert* iface,
     }
     break;
     default:
-        FIXME("unimplemented for destination type %d\n", dst_type);
+        FIXME("unimplemented for conversion %d->%d\n", src_type, dst_type);
         return E_NOTIMPL;
     }