diff --git a/plugins/encode64/encode64.plugin.zsh b/plugins/encode64/encode64.plugin.zsh
index 3b59447c5..4dbd1b453 100644
--- a/plugins/encode64/encode64.plugin.zsh
+++ b/plugins/encode64/encode64.plugin.zsh
@@ -1,4 +1,4 @@
 encode64(){ echo -n $1 | base64 }
-decode64(){ echo -n $1 | base64 -D }
+decode64(){ echo -n $1 | base64 --decode }
 alias e64=encode64
 alias d64=decode64