diff --git a/dispd/client/window.cpp b/dispd/client/window.cpp
index bfee9424..89bcc84e 100644
--- a/dispd/client/window.cpp
+++ b/dispd/client/window.cpp
@@ -26,6 +26,7 @@
 #include <sys/display.h>
 
 #include <fcntl.h>
+#include <ioleast.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdlib.h>
diff --git a/libc/stdio/vdprintf.cpp b/libc/stdio/vdprintf.cpp
index 14d3f8f0..4192ba14 100644
--- a/libc/stdio/vdprintf.cpp
+++ b/libc/stdio/vdprintf.cpp
@@ -22,6 +22,7 @@
 
 *******************************************************************************/
 
+#include <ioleast.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdint.h>
diff --git a/mbr/mbrfs.cpp b/mbr/mbrfs.cpp
index 844dcdb4..de792104 100644
--- a/mbr/mbrfs.cpp
+++ b/mbr/mbrfs.cpp
@@ -24,6 +24,7 @@
 #include <errno.h>
 #include <error.h>
 #include <fcntl.h>
+#include <ioleast.h>
 #include <stdio.h>
 #include <stdint.h>
 #include <stdlib.h>