diff --git a/libc/include/amd64-sysv/stdio.h
b/libc/include/amd64-sysv/stdio.h
index 1341918..ea5fc78 100644
--- a/libc/include/amd64-sysv/stdio.h
+++ b/libc/include/amd64-sysv/stdio.h
@@ -75,5 +75,5 @@ extern int rename(const char *old, const char *new);
extern FILE *tmpfile(void);
extern FILE *tmpnam(char *s);
-extern FILE *stdin, *stdio, *stderr;
+extern FILE *stdin, *stdout, *stderr;
#endif
diff --git a/libc/include/i386-sysv/stdio.h
b/libc/include/i386-sysv/stdio.h
index 1341918..ea5fc78 100644
--- a/libc/include/i386-sysv/stdio.h
+++ b/libc/include/i386-sysv/stdio.h
@@ -75,5 +75,5 @@ extern int rename(const char *old, const char *new);
extern FILE *tmpfile(void);
extern FILE *tmpnam(char *s);
-extern FILE *stdin, *stdio, *stderr;
+extern FILE *stdin, *stdout, *stderr;
#endif
diff --git a/libc/include/qbe/stdio.h b/libc/include/qbe/stdio.h
index 1341918..ea5fc78 100644
--- a/libc/include/qbe/stdio.h
+++ b/libc/include/qbe/stdio.h
@@ -75,5 +75,5 @@ extern int rename(const char *old, const char *new);
extern FILE *tmpfile(void);
extern FILE *tmpnam(char *s);
-extern FILE *stdin, *stdio, *stderr;
+extern FILE *stdin, *stdout, *stderr;
#endif
diff --git a/libc/include/z80/stdio.h b/libc/include/z80/stdio.h
index 38c3c36..1122eb6 100644
--- a/libc/include/z80/stdio.h
+++ b/libc/include/z80/stdio.h
@@ -75,5 +75,5 @@ extern int rename(const char *old, const char *new);
extern FILE *tmpfile(void);
extern FILE *tmpnam(char *s);
-extern FILE *stdin, *stdio, *stderr;
+extern FILE *stdin, *stdout, *stderr;
#endif