diff --git a/library/modules/Buildings.cpp b/library/modules/Buildings.cpp
index 3d0d89c49..78c7b00ed 100644
--- a/library/modules/Buildings.cpp
+++ b/library/modules/Buildings.cpp
@@ -357,7 +357,7 @@ bool Buildings::setOwner(df::building_civzonest *bld, df::unit *unit)
     if (bld->assigned_unit == unit)
         return true;
 
-    df::building * pbld = dynamic_cast<df::building*>(bld);
+    df::building * pbld = virtual_cast<df::building>(bld);
 
     if (bld->assigned_unit)
     {