diff --git a/app/viewer/mediapanel.cpp b/app/viewer/mediapanel.cpp
index ff58230..1196e05 100644
--- a/app/viewer/mediapanel.cpp
+++ b/app/viewer/mediapanel.cpp
@@ -356,7 +356,7 @@ void MediaPanel::OpenMediaInstance(si::Object *o)
 
     m->Open(o->ExtractToMemory());
     m->SetStartOffset(float(o->time_offset_) * 0.001f);
-    m->SetVolume(float(o->volume_) / 79.0f);
+    m->SetVolume(float(o->volume_) / si::MxOb::MAXIMUM_VOLUME);
     m->SetVirtualTime(0);
 
     m_mediaInstances.push_back(m);
diff --git a/lib/sitypes.h b/lib/sitypes.h
index 70585bb..c213d6e 100644
--- a/lib/sitypes.h
+++ b/lib/sitypes.h
@@ -247,6 +247,9 @@ public:
   //        probably be moved
   LIBWEAVER_EXPORT static const char *GetTypeName(Type type);
   LIBWEAVER_EXPORT static std::vector<const char*> GetFlagsName(Flags flags);
+
+  static const int MAXIMUM_VOLUME = 79;
+
 };
 
 }