diff --git a/src/hotkey/hotkey_command.cpp b/src/hotkey/hotkey_command.cpp
index 7437b421fa5f1..aa207dd697512 100644
--- a/src/hotkey/hotkey_command.cpp
+++ b/src/hotkey/hotkey_command.cpp
@@ -322,6 +322,7 @@ void set_active_scopes(hk_scopes s)
 
 bool is_scope_active(scope s)
 {
+	assert(s < SCOPE_COUNT);
 	return scope_active_[s];
 }