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-rw-r--r--minui/minui.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/minui/minui.h b/minui/minui.h
index fb0bbe10c..cddfe77f3 100644
--- a/minui/minui.h
+++ b/minui/minui.h
@@ -67,7 +67,7 @@ typedef int (*ev_set_key_callback)(int code, int value, void* data);
int ev_init(ev_callback input_cb, void* data);
void ev_exit();
int ev_add_fd(int fd, ev_callback cb, void* data);
-void ev_iterate_available_keys(std::function<void(int)> f);
+void ev_iterate_available_keys(const std::function<void(int)>& f);
int ev_sync_key_state(ev_set_key_callback set_key_cb, void* data);
// 'timeout' has the same semantics as poll(2).