diff --git a/sdlpp.hpp b/sdlpp.hpp
index 0243904..97be992 100644
--- a/sdlpp.hpp
+++ b/sdlpp.hpp
@@ -577,14 +577,21 @@ private:
     void checkKilled() {
         render_mutex.lock();
         std::vector< int > killed;
+        std::vector< int > killed_collisions;
         for ( long unsigned int i = 0; i < renderObjects.size(); i++ ) {
             if ( renderObjects[i]->getKilled() )
                 killed.push_back( i );
+            if ( i < collisionObjects.size() && collisionObjects[i]->getKilled() )
+                killed_collisions.push_back( i );
         }
         std::reverse( killed.begin(), killed.end() );
+        std::reverse( killed_collisions.begin(), killed_collisions.end() );
         for ( auto &index : killed ) {
             renderObjects.erase( renderObjects.begin() + index );
         }
+        for ( auto &index : killed_collisions ) {
+            collisionObjects.erase( collisionObjects.begin() + index );
+        }
         render_mutex.unlock();
     }