diff --git a/src/events.rs b/src/events.rs
index 512c175..73eb88e 100644
--- a/src/events.rs
+++ b/src/events.rs
@@ -127,6 +127,9 @@ impl Irc {
         }
 
         let mut context = self.context.write().await;
+        if !context.systems.contains_key(&sys_name) {
+            return;
+        }
         let response = context.run_system(prefix, &sys_name).await;
 
         if response.0.is_none() {