diff --git a/include/Makefile.am b/include/Makefile.am
index c55bbb1..3814fce 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -7,6 +7,7 @@ noinst_HEADERS += sys/socket.h
 noinst_HEADERS += sys/types.h
 noinst_HEADERS += sys/time.h
 noinst_HEADERS += sys/mman.h
+noinst_HEADERS += sys/wait.h
 noinst_HEADERS += err.h
 noinst_HEADERS += ifaddrs.h
 noinst_HEADERS += imsg.h
diff --git a/include/sys/wait.h b/include/sys/wait.h
new file mode 100644
index 0000000..fc20051
--- /dev/null
+++ b/include/sys/wait.h
@@ -0,0 +1,15 @@
+/*
+ * Public domain
+ * sys/wait.h compatibility shim
+ */
+
+#include_next <sys/wait.h>
+
+#ifndef LIBCOMPAT_SYS_WAIT_H
+#define LIBCOMPAT_SYS_WAIT_H
+
+#ifndef WAIT_ANY
+#define WAIT_ANY (-1) /* Any process. */
+#endif
+
+#endif