diff --git a/include/Makefile.am b/include/Makefile.am
index 9f42f05..728d921 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -8,6 +8,7 @@ noinst_HEADERS = pqueue.h
 noinst_HEADERS += compat/dirent.h
 noinst_HEADERS += compat/dirent_msvc.h
 noinst_HEADERS += compat/err.h
+noinst_HEADERS += compat/fcntl.h
 noinst_HEADERS += compat/limits.h
 noinst_HEADERS += compat/netdb.h
 noinst_HEADERS += compat/poll.h
diff --git a/include/compat/fcntl.h b/include/compat/fcntl.h
new file mode 100644
index 0000000..99c2d58
--- /dev/null
+++ b/include/compat/fcntl.h
@@ -0,0 +1,32 @@
+/*
+ * Public domain
+ * fcntl.h compatibility shim
+ */
+
+#ifndef _WIN32
+#include_next <fcntl.h>
+#else
+
+#ifdef _MSC_VER
+#if _MSC_VER >= 1900
+#include <../ucrt/fcntl.h>
+#else
+#include <../include/fcntl.h>
+#endif
+#else
+#include_next <fcntl.h>
+#endif
+
+#ifndef O_NONBLOCK
+#define O_NONBLOCK      0x100000
+#endif
+
+#ifndef O_CLOEXEC
+#define O_CLOEXEC       0x200000
+#endif
+
+#ifndef FD_CLOEXEC
+#define FD_CLOEXEC      1
+#endif
+
+#endif