diff --git a/binder/includeConstants.txt b/binder/includeConstants.txt
index ed3f92be129..b72808d1b3f 100644
--- a/binder/includeConstants.txt
+++ b/binder/includeConstants.txt
@@ -1,6 +1,6 @@
-# enum FIRRTLPortDirection
-FIRRTL_PORT_DIR_INPUT
-FIRRTL_PORT_DIR_OUTPUT
+# enum FIRRTLDirection
+FIRRTL_DIRECTION_IN
+FIRRTL_DIRECTION_OUT
 # enum FIRRTLConvention
 FIRRTL_CONVENTION_INTERNAL
 FIRRTL_CONVENTION_SCALARIZED
diff --git a/binder/src/main/scala/PanamaCIRCT.scala b/binder/src/main/scala/PanamaCIRCT.scala
index 616a43f12fb..27040cfe0bd 100644
--- a/binder/src/main/scala/PanamaCIRCT.scala
+++ b/binder/src/main/scala/PanamaCIRCT.scala
@@ -444,7 +444,7 @@ class PanamaCIRCT {
     MlirType(CAPI.firrtlTypeGetBundle(arena, mlirCtx, fields.length, buffer))
   }
 
-  def firrtlAttrGetPortDirs(dirs: Seq[FIRRTLPortDir]): MlirAttribute = {
+  def firrtlAttrGetPortDirs(dirs: Seq[FIRRTLDirection]): MlirAttribute = {
     val (ptr, length) = seqToArray(dirs)
     MlirAttribute(CAPI.firrtlAttrGetPortDirs(arena, mlirCtx, length, ptr))
   }
@@ -657,13 +657,13 @@ object FIRRTLNameKind {
   final case object InterestingName extends FIRRTLNameKind(value = CAPI.FIRRTL_NAME_KIND_INTERESTING_NAME())
 }
 
-sealed abstract class FIRRTLPortDir(val value: Int) extends ForeignType[Int] {
+sealed abstract class FIRRTLDirection(val value: Int) extends ForeignType[Int] {
   private[circt] def get = value
   private[circt] val sizeof = 4 // FIXME: jextract doesn't export type for C enum
 }
-object FIRRTLPortDir {
-  final case object Input extends FIRRTLPortDir(value = CAPI.FIRRTL_PORT_DIR_INPUT())
-  final case object Output extends FIRRTLPortDir(value = CAPI.FIRRTL_PORT_DIR_OUTPUT())
+object FIRRTLDirection {
+  final case object In extends FIRRTLDirection(value = CAPI.FIRRTL_DIRECTION_IN())
+  final case object Out extends FIRRTLDirection(value = CAPI.FIRRTL_DIRECTION_OUT())
 }
 
 sealed abstract class firrtlAttrGetRUW(val value: Int) extends ForeignType[Int] {
diff --git a/binder/src/main/scala/PanamaCIRCTConverter.scala b/binder/src/main/scala/PanamaCIRCTConverter.scala
index 46d0f81e7bb..b245830d441 100644
--- a/binder/src/main/scala/PanamaCIRCTConverter.scala
+++ b/binder/src/main/scala/PanamaCIRCTConverter.scala
@@ -33,7 +33,7 @@ case class Op(state: MlirOperationState, op: MlirOperation, regions: Seq[Region]
 
 case class Ports(
   types:           Seq[MlirType],
-  dirs:            Seq[FIRRTLPortDir],
+  dirs:            Seq[FIRRTLDirection],
   locs:            Seq[MlirLocation],
   names:           Seq[String],
   nameAttrs:       Seq[MlirAttribute],
@@ -199,8 +199,8 @@ class PanamaCIRCTConverter extends CIRCTConverter {
       Ports(
         types = types,
         dirs = irs.map(_.direction match {
-          case fir.Input  => FIRRTLPortDir.Input
-          case fir.Output => FIRRTLPortDir.Output
+          case fir.Input  => FIRRTLDirection.In
+          case fir.Output => FIRRTLDirection.Out
         }),
         locs = locs,
         names = irs.map(_.name),