diff --git a/src/common/compat_dummy.c b/src/common/compat_dummy.c
index 6ca34e29..1dc23ebd 100644
--- a/src/common/compat_dummy.c
+++ b/src/common/compat_dummy.c
@@ -1,3 +1,4 @@
 /* Required so ld will not complain regarding empty lib */
+void compat_dummy (void);
 void compat_dummy (void) {
 }