diff --git a/lisp/breakpoint.c b/lisp/breakpoint.c
index 672800eda611e89aaa61e457cd748f5906d6bb32..20b1ce9a319ea8a6b30f0c8ffbdd396226e57a87 100644
--- a/lisp/breakpoint.c
+++ b/lisp/breakpoint.c
@@ -4,6 +4,7 @@
 #include "lisp.h"
 #include "os.h"
 #include "internals.h"
+#include "interrupt.h"
 #include "arch.h"
 #include "lispregs.h"
 #include "globals.h"