diff --git a/src/prepare/compile.rs b/src/prepare/compile.rs
index 8a89faa..3ee5360 100644
--- a/src/prepare/compile.rs
+++ b/src/prepare/compile.rs
@@ -13,7 +13,7 @@ use validation::{Error, FuncValidator};
 use isa;
 
 /// Type of block frame.
-#[derive(Debug, Clone, Copy, PartialEq)]
+#[derive(Debug, Clone, Copy)]
 enum BlockFrameType {
     /// Usual block frame.
     ///