diff --git a/src/writer.rs b/src/writer.rs
index c3f7d29a..e89a1d6e 100644
--- a/src/writer.rs
+++ b/src/writer.rs
@@ -251,7 +251,7 @@ impl<W: Writer+Seek> GenericZipWriter<W>
         match *self
         {
             Storer(ref mut w) => w,
-            _ => fail!("Should have switched to stored beforehand"),
+            _ => panic!("Should have switched to stored beforehand"),
         }
     }
 
@@ -260,7 +260,7 @@ impl<W: Writer+Seek> GenericZipWriter<W>
         match self
         {
             Storer(w) => w,
-            _ => fail!("Should have switched to stored beforehand"),
+            _ => panic!("Should have switched to stored beforehand"),
         }
     }
 }