diff --git a/libc/stdio/confstr.c b/libc/stdio/confstr.c
index 735b9589d..746268475 100644
--- a/libc/stdio/confstr.c
+++ b/libc/stdio/confstr.c
@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/paths.h"
-#include "libc/stdio/stdio.h"
 #include "libc/str/str.h"
 #include "libc/sysv/errfuns.h"
 #include "libc/unistd.h"
diff --git a/libc/stdio/stdio.h b/libc/stdio/stdio.h
index 4d385e0ba..d9f560b2b 100644
--- a/libc/stdio/stdio.h
+++ b/libc/stdio/stdio.h
@@ -79,7 +79,6 @@ int setvbuf(FILE *, char *, int, size_t) libcesque;
 int pclose(FILE *) libcesque;
 char *ctermid(char *) libcesque;
 void perror(const char *) libcesque relegated;
-size_t confstr(int, char *, size_t) libcesque;
 
 typedef uint64_t fpos_t;
 char *gets(char *) libcesque paramsnonnull();
diff --git a/libc/unistd.h b/libc/unistd.h
index 04bf9c95a..2eb5b346a 100644
--- a/libc/unistd.h
+++ b/libc/unistd.h
@@ -4,6 +4,8 @@ COSMOPOLITAN_C_START_
 
 #define _CS_PATH 0
 
+size_t confstr(int, char *, size_t) libcesque;
+
 #if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE) || \
     defined(_COSMO_SOURCE)
 void encrypt(char *, int) libcesque;