diff --git a/sysdeps/unix/sysv/linux/alpha/Makefile b/sysdeps/unix/sysv/linux/alpha/Makefile
index b62a871506..3265e0fa1e 100644
--- a/sysdeps/unix/sysv/linux/alpha/Makefile
+++ b/sysdeps/unix/sysv/linux/alpha/Makefile
@@ -3,7 +3,7 @@ sysdep_routines += oldglob
 endif
 
 ifeq ($(subdir),misc)
-sysdep_headers += alpha/ptrace.h alpha/regdef.h
+sysdep_headers += alpha/ptrace.h alpha/regdef.h sys/io.h
 
 sysdep_routines += ieee_get_fp_control ieee_set_fp_control \
 		   sethae ioperm osf_sigprocmask llseek adjtimex
diff --git a/sysdeps/unix/sysv/linux/arm/Makefile b/sysdeps/unix/sysv/linux/arm/Makefile
index 79eff05b90..b82a6ef160 100644
--- a/sysdeps/unix/sysv/linux/arm/Makefile
+++ b/sysdeps/unix/sysv/linux/arm/Makefile
@@ -1,6 +1,6 @@
 ifeq ($(subdir),misc)
 sysdep_routines += setfsgid setfsuid setresgid setresuid ioperm
-sysdep_headers += sys/elf.h
+sysdep_headers += sys/elf.h sys/io.h
 endif
 
 ifeq ($(subdir),signal)