diff --git a/ss/Towers.cc b/ss/Towers.cc
index 892f53b..6269ae2 100644
--- a/ss/Towers.cc
+++ b/ss/Towers.cc
@@ -163,7 +163,9 @@ void Towers::update()
                 it++;
             delete *it;
             m_logos.erase(it);
-            m_logoToRemove = (m_logos.size() > 0) ? rand() % m_logos.size() : -1;
+            m_logoToRemove = (m_logos.size() > 0)
+                ? (int) (rand() % m_logos.size())
+                : -1;
             m_lastRemoveTime = m_elapsed;
         }
     }