diff --git a/libports/ports/libc.mk b/libports/ports/libc.mk
index aa8ccdbf9a..a7b8763603 100644
--- a/libports/ports/libc.mk
+++ b/libports/ports/libc.mk
@@ -245,6 +245,7 @@ LIBC_IMPORT_INCLUDES += include/libc/sys/queue.h \
                         include/libc/sys/file.h \
                         include/libc/sys/fcntl.h \
                         include/libc/sys/resource.h \
+                        include/libc/sys/disk.h \
                         include/libc/sys/disklabel.h \
                         include/libc/sys/link_elf.h \
                         include/libc/sys/endian.h \