diff --git a/state.h b/state.h
index d627b91..fda668f 100644
--- a/state.h
+++ b/state.h
@@ -2,7 +2,7 @@
 
 #include <stdint.h>
 #include <stdbool.h>
-#include "vco.hh"
+#include "vco.h"
 
 typedef struct {
 	union {