diff --git a/unix/mkpost.go b/unix/mkpost.go
index 42000693..a2755180 100644
--- a/unix/mkpost.go
+++ b/unix/mkpost.go
@@ -63,6 +63,11 @@ func main() {
 		// the process creation time.
 		externProcStarttimeRegex := regexp.MustCompile(`P_un\s*\[\d+\]byte`)
 		b = externProcStarttimeRegex.ReplaceAll(b, []byte("P_starttime Timeval"))
+
+		// Convert [n]int8 to [n]byte in Eproc and ExternProc members to
+		// simplify conversion to string.
+		convertEprocRegex := regexp.MustCompile(`(P_comm|Wmesg|Login)(\s+)\[(\d+)\]int8`)
+		b = convertEprocRegex.ReplaceAll(b, []byte("$1$2[$3]byte"))
 	}
 
 	// Intentionally export __val fields in Fsid and Sigset_t
diff --git a/unix/ztypes_darwin_amd64.go b/unix/ztypes_darwin_amd64.go
index 7efe5ccb..885842c0 100644
--- a/unix/ztypes_darwin_amd64.go
+++ b/unix/ztypes_darwin_amd64.go
@@ -641,13 +641,13 @@ type Eproc struct {
 	Tdev    int32
 	Tpgid   int32
 	Tsess   uintptr
-	Wmesg   [8]int8
+	Wmesg   [8]byte
 	Xsize   int32
 	Xrssize int16
 	Xccount int16
 	Xswrss  int16
 	Flag    int32
-	Login   [12]int8
+	Login   [12]byte
 	Spare   [4]int32
 	_       [4]byte
 }
@@ -688,7 +688,7 @@ type ExternProc struct {
 	P_priority  uint8
 	P_usrpri    uint8
 	P_nice      int8
-	P_comm      [17]int8
+	P_comm      [17]byte
 	P_pgrp      uintptr
 	P_addr      uintptr
 	P_xstat     uint16
diff --git a/unix/ztypes_darwin_arm64.go b/unix/ztypes_darwin_arm64.go
index b23a2efe..b23c0233 100644
--- a/unix/ztypes_darwin_arm64.go
+++ b/unix/ztypes_darwin_arm64.go
@@ -641,13 +641,13 @@ type Eproc struct {
 	Tdev    int32
 	Tpgid   int32
 	Tsess   uintptr
-	Wmesg   [8]int8
+	Wmesg   [8]byte
 	Xsize   int32
 	Xrssize int16
 	Xccount int16
 	Xswrss  int16
 	Flag    int32
-	Login   [12]int8
+	Login   [12]byte
 	Spare   [4]int32
 	_       [4]byte
 }
@@ -688,7 +688,7 @@ type ExternProc struct {
 	P_priority  uint8
 	P_usrpri    uint8
 	P_nice      int8
-	P_comm      [17]int8
+	P_comm      [17]byte
 	P_pgrp      uintptr
 	P_addr      uintptr
 	P_xstat     uint16