diff --git a/libc/bionic/pty.cpp b/libc/bionic/pty.cpp
index 71e14d9..c0e2721 100644
--- a/libc/bionic/pty.cpp
+++ b/libc/bionic/pty.cpp
@@ -112,14 +112,14 @@
   return ioctl(fd, TIOCSPTLCK, &unlock);
 }
 
-int openpty(int* master, int* slave, char* name, const termios* t, const winsize* ws) {
-  *master = getpt();
-  if (*master == -1) {
+int openpty(int* pty, int* tty, char* name, const termios* t, const winsize* ws) {
+  *pty = getpt();
+  if (*pty == -1) {
     return -1;
   }
 
-  if (grantpt(*master) == -1 || unlockpt(*master) == -1) {
-    close(*master);
+  if (grantpt(*pty) == -1 || unlockpt(*pty) == -1) {
+    close(*pty);
     return -1;
   }
 
@@ -127,54 +127,54 @@
   if (name == nullptr) {
     name = buf;
   }
-  if (ptsname_r(*master, name, sizeof(buf)) != 0) {
-    close(*master);
+  if (ptsname_r(*pty, name, sizeof(buf)) != 0) {
+    close(*pty);
     return -1;
   }
 
-  *slave = open(name, O_RDWR|O_NOCTTY);
-  if (*slave == -1) {
-    close(*master);
+  *tty = open(name, O_RDWR | O_NOCTTY);
+  if (*tty == -1) {
+    close(*pty);
     return -1;
   }
 
   if (t != nullptr) {
-    tcsetattr(*slave, TCSAFLUSH, t);
+    tcsetattr(*tty, TCSAFLUSH, t);
   }
   if (ws != nullptr) {
-    ioctl(*slave, TIOCSWINSZ, ws);
+    ioctl(*tty, TIOCSWINSZ, ws);
   }
 
   return 0;
 }
 
-int forkpty(int* amaster, char* name, const termios* t, const winsize* ws) {
-  int master;
-  int slave;
-  if (openpty(&master, &slave, name, t, ws) == -1) {
+int forkpty(int* parent_pty, char* child_tty_name, const termios* t, const winsize* ws) {
+  int pty;
+  int tty;
+  if (openpty(&pty, &tty, child_tty_name, t, ws) == -1) {
     return -1;
   }
 
   pid_t pid = fork();
   if (pid == -1) {
-    close(master);
-    close(slave);
+    close(pty);
+    close(tty);
     return -1;
   }
 
   if (pid == 0) {
     // Child.
-    *amaster = -1;
-    close(master);
-    if (login_tty(slave) == -1) {
+    *parent_pty = -1;
+    close(pty);
+    if (login_tty(tty) == -1) {
       _exit(1);
     }
     return 0;
   }
 
   // Parent.
-  *amaster = master;
-  close(slave);
+  *parent_pty = pty;
+  close(tty);
   return pid;
 }