diff --git a/src/engine/platform/fmsharedbase.h b/src/engine/platform/fmsharedbase.h
index b59b419d..b08bda9f 100644
--- a/src/engine/platform/fmsharedbase.h
+++ b/src/engine/platform/fmsharedbase.h
@@ -79,6 +79,7 @@ class DivPlatformFMBase: public DivDispatch {
       unsigned short addr;
       unsigned char val;
       bool addrOrVal;
+      QueuedWrite(): addr(0), val(0), addrOrVal(false) {}
       QueuedWrite(unsigned short a, unsigned char v): addr(a), val(v), addrOrVal(false) {}
     };
     std::deque<QueuedWrite> writes;