diff --git a/fix-codegen/src/lib.rs b/fix-codegen/src/lib.rs
index 4cf3903..b253297 100644
--- a/fix-codegen/src/lib.rs
+++ b/fix-codegen/src/lib.rs
@@ -795,18 +795,6 @@ impl<'a, Ctx: BytecodeContext> BytecodeEmitter<'a, Ctx> {
                 let end_offset = (self.ctx.get_code_mut().len() as i32) - (after_jump as i32);
                 self.patch_i32(end_placeholder, end_offset);
             }
-            PipeL => {
-                todo!("new call");
-                // self.emit_expr(rhs);
-                // self.emit_expr(lhs);
-                // self.emit_op(Op::Call);
-            }
-            PipeR => {
-                todo!("new call");
-                // self.emit_expr(lhs);
-                // self.emit_expr(rhs);
-                // self.emit_op(Op::Call);
-            }
             _ => {
                 self.emit_expr(lhs);
                 self.emit_expr(rhs);
diff --git a/fix-ir/src/downgrade.rs b/fix-ir/src/downgrade.rs
index eb51d42..336b6b5 100644
--- a/fix-ir/src/downgrade.rs
+++ b/fix-ir/src/downgrade.rs
@@ -266,10 +266,37 @@ impl<'id: 'ir, 'ir, Ctx: DowngradeContext<'id, 'ir>> Downgrade<'id, 'ir, Ctx> fo
 
 impl<'id: 'ir, 'ir, Ctx: DowngradeContext<'id, 'ir>> Downgrade<'id, 'ir, Ctx> for ast::BinOp {
     fn downgrade(self, ctx: &mut Ctx) -> Result<GhostRoIrRef<'id, 'ir>> {
+        use ast::BinOpKind as Kind;
+        use BinOpKind::*;
+
         let span = self.syntax().text_range();
         let lhs = self.lhs().require(ctx, span)?.downgrade(ctx)?;
         let rhs = self.rhs().require(ctx, span)?.downgrade(ctx)?;
-        let kind = self.operator().require(ctx, span)?.into();
+        let kind = match self.operator().require(ctx, span)? {
+            Kind::Concat => Con,
+            Kind::Update => Upd,
+            Kind::Add => Add,
+            Kind::Sub => Sub,
+            Kind::Mul => Mul,
+            Kind::Div => Div,
+            Kind::And => And,
+            Kind::Equal => Eq,
+            Kind::Implication => Impl,
+            Kind::Less => Lt,
+            Kind::LessOrEq => Leq,
+            Kind::More => Gt,
+            Kind::MoreOrEq => Geq,
+            Kind::NotEqual => Neq,
+            Kind::Or => Or,
+            Kind::PipeLeft => {
+                let arg = ctx.maybe_thunk(rhs);
+                return Ok(ctx.new_expr(Ir::Call { func: lhs, arg, span }))
+            },
+            Kind::PipeRight => {
+                let arg = ctx.maybe_thunk(lhs);
+                return Ok(ctx.new_expr(Ir::Call { func: rhs, arg, span }))
+            },
+        };
         Ok(ctx.new_expr(Ir::BinOp { lhs, rhs, kind }))
     }
 }
diff --git a/fix-ir/src/lib.rs b/fix-ir/src/lib.rs
index cd55c99..76db4c9 100644
--- a/fix-ir/src/lib.rs
+++ b/fix-ir/src/lib.rs
@@ -265,36 +265,6 @@ pub enum BinOpKind {
     // Set/String/Path operations
     Con, // List concatenation (`++`)
     Upd, // AttrSet update (`//`)
-
-    // Not standard, but part of rnix AST
-    PipeL,
-    PipeR,
-}
-
-impl From<ast::BinOpKind> for BinOpKind {
-    fn from(op: ast::BinOpKind) -> Self {
-        use BinOpKind::*;
-        use ast::BinOpKind as kind;
-        match op {
-            kind::Concat => Con,
-            kind::Update => Upd,
-            kind::Add => Add,
-            kind::Sub => Sub,
-            kind::Mul => Mul,
-            kind::Div => Div,
-            kind::And => And,
-            kind::Equal => Eq,
-            kind::Implication => Impl,
-            kind::Less => Lt,
-            kind::LessOrEq => Leq,
-            kind::More => Gt,
-            kind::MoreOrEq => Geq,
-            kind::NotEqual => Neq,
-            kind::Or => Or,
-            kind::PipeLeft => PipeL,
-            kind::PipeRight => PipeR,
-        }
-    }
 }
 
 /// The kinds of unary operations.