diff --git a/libc/src/fcntl/linux/CMakeLists.txt b/libc/src/fcntl/linux/CMakeLists.txt
index ecfb2cdd3f336..580db16cd4132 100644
--- a/libc/src/fcntl/linux/CMakeLists.txt
+++ b/libc/src/fcntl/linux/CMakeLists.txt
@@ -29,6 +29,7 @@ add_entrypoint_object(
     ../open.h
   DEPENDS
     libc.hdr.types.mode_t
+    libc.hdr.fcntl_macros
     libc.src.__support.OSUtil.osutil
     libc.src.errno.errno
 )
diff --git a/libc/src/fcntl/linux/open.cpp b/libc/src/fcntl/linux/open.cpp
index 9f3d035388e86..8b699ecdd2043 100644
--- a/libc/src/fcntl/linux/open.cpp
+++ b/libc/src/fcntl/linux/open.cpp
@@ -13,6 +13,7 @@
 #include "src/__support/macros/config.h"
 #include "src/errno/libc_errno.h"
 
+#include "hdr/fcntl_macros.h"
 #include "hdr/types/mode_t.h"
 #include <stdarg.h>
 #include <sys/syscall.h> // For syscall numbers.
diff --git a/libc/src/spawn/linux/CMakeLists.txt b/libc/src/spawn/linux/CMakeLists.txt
index 5f7ab4c43165d..26148fe1c76db 100644
--- a/libc/src/spawn/linux/CMakeLists.txt
+++ b/libc/src/spawn/linux/CMakeLists.txt
@@ -6,6 +6,7 @@ add_entrypoint_object(
     ../posix_spawn.h
   DEPENDS
     libc.hdr.types.mode_t
+    libc.hdr.fcntl_macros
     libc.include.spawn
     libc.include.sys_syscall
     libc.include.signal
diff --git a/libc/src/spawn/linux/posix_spawn.cpp b/libc/src/spawn/linux/posix_spawn.cpp
index d6caf8b374a02..fe82ba260148a 100644
--- a/libc/src/spawn/linux/posix_spawn.cpp
+++ b/libc/src/spawn/linux/posix_spawn.cpp
@@ -14,6 +14,7 @@
 #include "src/__support/macros/config.h"
 #include "src/spawn/file_actions.h"
 
+#include "hdr/fcntl_macros.h"
 #include "hdr/types/mode_t.h"
 #include <signal.h> // For SIGCHLD
 #include <spawn.h>