diff --git a/dln.c b/dln.c
index 4db72cdead..917e5ac561 100644
--- a/dln.c
+++ b/dln.c
@@ -1562,7 +1562,7 @@ dln_load(file)
 #endif /* __VMS */
 
 #ifndef DLN_DEFINED
-    rb_notimplement("dynamic link not supported");
+    rb_notimplement();
 #endif
 
 #endif /* USE_DLN_A_OUT */