1 files changed, 4 insertions, 4 deletions
diff --git a/ext/dl/dl.c b/ext/dl/dl.c
index 984a62a7ef..00762c5be1 100644
--- a/ext/dl/dl.c
+++ b/ext/dl/dl.c
@@ -74,11 +74,11 @@ rb_dl_init_callbacks(VALUE dl)
 }
 
 void
-Init_dl()
+Init_dl(void)
 {
-    void Init_dlhandle();
-    void Init_dlcfunc();
-    void Init_dlptr();
+    void Init_dlhandle(void);
+    void Init_dlcfunc(void);
+    void Init_dlptr(void);
 
     rbdl_id_cdecl = rb_intern_const("cdecl");
     rbdl_id_stdcall = rb_intern_const("stdcall");