diff --git a/src/main/scala/leon/genc/CConverter.scala b/src/main/scala/leon/genc/CConverter.scala
index 9ccad62cd9348131eb178608a1dd2ad833c4d7e7..c4c606f37780dbe1fc9407d40cf9100bff89d16a 100644
--- a/src/main/scala/leon/genc/CConverter.scala
+++ b/src/main/scala/leon/genc/CConverter.scala
@@ -368,8 +368,8 @@ class CConverter(val ctx: LeonContext, val prog: Program) {
     case BVOr(lhs, rhs)           => buildBinOp(lhs, "|",   rhs)
     case BVXOr(lhs, rhs)          => buildBinOp(lhs, "^",   rhs)
     case BVShiftLeft(lhs, rhs)    => buildBinOp(lhs, "<<",  rhs)
-    case BVAShiftRight(lhs, rhs)  => buildBinOp(lhs, ">>>", rhs)
-    case BVLShiftRight(lhs, rhs)  => buildBinOp(lhs, ">>",  rhs)
+    case BVAShiftRight(lhs, rhs)  => buildBinOp(lhs, ">>", rhs)
+    case BVLShiftRight(lhs, rhs)  => fatalError("operator >>> not supported")
 
     // Ignore assertions for now
     case Ensuring(body, _) => convert(body)
diff --git a/src/main/scala/leon/purescala/Expressions.scala b/src/main/scala/leon/purescala/Expressions.scala
index 13e4efbef15d754765776de6153c9f5a8b65c6c8..50efdf4065a005b234b696f0b2589c85855cc13f 100644
--- a/src/main/scala/leon/purescala/Expressions.scala
+++ b/src/main/scala/leon/purescala/Expressions.scala
@@ -725,11 +725,11 @@ object Expressions {
   case class BVShiftLeft(lhs: Expr, rhs: Expr) extends Expr {
     val getType = Int32Type
   }
-  /** $encodingof `... >>> ...` $noteBitvector (logical shift) */
+  /** $encodingof `... >> ...` $noteBitvector (arithmetic shift, sign-preserving) */
   case class BVAShiftRight(lhs: Expr, rhs: Expr) extends Expr {
     val getType = Int32Type
   }
-  /** $encodingof `... >> ...` $noteBitvector (arithmetic shift, sign-preserving) */
+  /** $encodingof `... >>> ...` $noteBitvector (logical shift) */
   case class BVLShiftRight(lhs: Expr, rhs: Expr) extends Expr {
     val getType = Int32Type
   }