diff --git a/libc/bionic/bionic_systrace.cpp b/libc/bionic/bionic_systrace.cpp
index f5be415..c74a52c 100644
--- a/libc/bionic/bionic_systrace.cpp
+++ b/libc/bionic/bionic_systrace.cpp
@@ -15,6 +15,7 @@
  */
 
 #include <cutils/trace.h>
+#include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/libc/bionic/chown.cpp b/libc/bionic/chown.cpp
index bc2e605..dce1673 100644
--- a/libc/bionic/chown.cpp
+++ b/libc/bionic/chown.cpp
@@ -29,6 +29,7 @@
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 int chown(const char* path, uid_t uid, gid_t gid) {
   return fchownat(AT_FDCWD, path, uid, gid, 0);
diff --git a/libc/bionic/lchown.cpp b/libc/bionic/lchown.cpp
index 95251db..24611a5 100644
--- a/libc/bionic/lchown.cpp
+++ b/libc/bionic/lchown.cpp
@@ -29,6 +29,7 @@
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 int lchown(const char* path, uid_t uid, gid_t gid) {
   return fchownat(AT_FDCWD, path, uid, gid, AT_SYMLINK_NOFOLLOW);
diff --git a/libc/bionic/poll.cpp b/libc/bionic/poll.cpp
index ebb318d..d267229 100644
--- a/libc/bionic/poll.cpp
+++ b/libc/bionic/poll.cpp
@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <sys/poll.h>
 #include <sys/select.h>
 
diff --git a/libc/bionic/raise.cpp b/libc/bionic/raise.cpp
index 0dd0ad7..b134b5a 100644
--- a/libc/bionic/raise.cpp
+++ b/libc/bionic/raise.cpp
@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <pthread.h>
 #include <signal.h>
 
diff --git a/libc/bionic/readlink.cpp b/libc/bionic/readlink.cpp
index a2c5e91..3bb7bc1 100644
--- a/libc/bionic/readlink.cpp
+++ b/libc/bionic/readlink.cpp
@@ -29,6 +29,7 @@
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 ssize_t readlink(const char* path, char* buf, size_t size) {
   return readlinkat(AT_FDCWD, path, buf, size);
diff --git a/libc/bionic/sigaddset.cpp b/libc/bionic/sigaddset.cpp
index 33ec6f8..6ade3b1 100644
--- a/libc/bionic/sigaddset.cpp
+++ b/libc/bionic/sigaddset.cpp
@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <signal.h>
 
 int sigaddset(sigset_t* set, int signum) {
diff --git a/libc/bionic/sigdelset.cpp b/libc/bionic/sigdelset.cpp
index 9eea250..3582f0d 100644
--- a/libc/bionic/sigdelset.cpp
+++ b/libc/bionic/sigdelset.cpp
@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <signal.h>
 
 int sigdelset(sigset_t* set, int signum) {
diff --git a/libc/bionic/sigemptyset.cpp b/libc/bionic/sigemptyset.cpp
index 2993169..8d8033f 100644
--- a/libc/bionic/sigemptyset.cpp
+++ b/libc/bionic/sigemptyset.cpp
@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <signal.h>
 
 int sigemptyset(sigset_t* set) {
diff --git a/libc/bionic/sigfillset.cpp b/libc/bionic/sigfillset.cpp
index 7b7cbb8..37792e5 100644
--- a/libc/bionic/sigfillset.cpp
+++ b/libc/bionic/sigfillset.cpp
@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <signal.h>
 
 int sigfillset(sigset_t* set) {
diff --git a/libc/bionic/sigismember.cpp b/libc/bionic/sigismember.cpp
index 0dc73ac..16acd09 100644
--- a/libc/bionic/sigismember.cpp
+++ b/libc/bionic/sigismember.cpp
@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <signal.h>
 
 int sigismember(const sigset_t* set, int signum) {
diff --git a/libc/bionic/termios.cpp b/libc/bionic/termios.cpp
index 082dcdc..44ae643 100644
--- a/libc/bionic/termios.cpp
+++ b/libc/bionic/termios.cpp
@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <termios.h>
 #include <unistd.h>
 
diff --git a/libc/bionic/utimes.cpp b/libc/bionic/utimes.cpp
index 65f2d0b..0b66e6c 100644
--- a/libc/bionic/utimes.cpp
+++ b/libc/bionic/utimes.cpp
@@ -26,6 +26,7 @@
  * SUCH DAMAGE.
  */
 
+#include <errno.h>
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/time.h>
diff --git a/libc/include/fcntl.h b/libc/include/fcntl.h
index b18ab12..4c4cfbd 100644
--- a/libc/include/fcntl.h
+++ b/libc/include/fcntl.h
@@ -35,7 +35,6 @@
 #include <linux/fcntl.h>
 #include <linux/stat.h>
 #include <linux/uio.h>
-#include <unistd.h>  /* this is not required, but makes client code much happier */
 
 __BEGIN_DECLS
 
diff --git a/libc/include/signal.h b/libc/include/signal.h
index 9519f6d..8988888 100644
--- a/libc/include/signal.h
+++ b/libc/include/signal.h
@@ -30,7 +30,6 @@
 #define _SIGNAL_H_
 
 #include <asm/sigcontext.h>
-#include <errno.h>
 #include <limits.h>
 #include <machine/pthread_types.h>
 #include <machine/timespec.h>
diff --git a/libc/upstream-netbsd/android/include/fd_setsize.h b/libc/upstream-netbsd/android/include/fd_setsize.h
index e69de29..41bfcb7 100644
--- a/libc/upstream-netbsd/android/include/fd_setsize.h
+++ b/libc/upstream-netbsd/android/include/fd_setsize.h
@@ -0,0 +1 @@
+#include <sys/select.h>