diff --git a/src/engine/engine.cpp b/src/engine/engine.cpp
index f85b62b3d..585f32646 100644
--- a/src/engine/engine.cpp
+++ b/src/engine/engine.cpp
@@ -1416,6 +1416,12 @@ void DivEngine::initSongWithDesc(const char* description, bool inBase64) {
     song.systemFlags[index].loadFromBase64(flags.c_str());
   }
   song.systemLen=index;
+  
+  // extra attributes
+  song.subsong[0]->hz=c.getDouble("tickRate",60.0);
+  if (song.subsong[0]->hz!=60.0) {
+    song.subsong[0]->customTempo=true;
+  }
 }
 
 void DivEngine::createNew(const char* description, String sysName, bool inBase64) {