diff --git a/sway/commands/emit.c b/sway/commands/emit.c
index 305eaf9b7..06defefb7 100644
--- a/sway/commands/emit.c
+++ b/sway/commands/emit.c
@@ -5,6 +5,7 @@
 #include "sway/input/seat.h"
 #include "sway/tree/container.h"
 #include "stringop.h"
+#include "util.h"
 
 
 struct keycode_matches {