diff --git a/Database/Persist/MySQL.hs b/Database/Persist/MySQL.hs
--- a/Database/Persist/MySQL.hs
+++ b/Database/Persist/MySQL.hs
@@ -697,7 +697,7 @@
 showAlter table (_, DropReference cname) = concat
     [ "ALTER TABLE "
     , escapeDBName table
-    , " DROP CONSTRAINT "
+    , " DROP FOREIGN KEY "
     , escapeDBName cname
     ]
 
diff --git a/persistent-mysql.cabal b/persistent-mysql.cabal
--- a/persistent-mysql.cabal
+++ b/persistent-mysql.cabal
@@ -1,5 +1,5 @@
 name:            persistent-mysql
-version:         0.8.3
+version:         0.8.4
 license:         BSD3
 license-file:    LICENSE
 author:          Felipe Lessa <felipe.lessa@gmail.com>, Michael Snoyman