diff --git a/tests/bugs/holes-in-debuginfo/test.c b/tests/bugs/holes-in-debuginfo/test.c
index 80e7cc4..950d892 100644
--- a/tests/bugs/holes-in-debuginfo/test.c
+++ b/tests/bugs/holes-in-debuginfo/test.c
@@ -1,3 +1,6 @@
+extern void k(int);
+extern void l(int, int*);
+
 void f(int i) {
   k(i);
 }