diff --git a/configure.ac b/configure.ac
index 4c90d6c48..494e44402 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1278,7 +1278,7 @@ AC_HEADER_STDC
 AC_CHECK_HEADERS([string.h unistd.h langinfo.h termio.h locale.h getopt.h \
                   pty.h utmp.h pwd.h inttypes.h signal.h sys/select.h     \
                   stdint.h signal.h util.h libutil.h termios.h \
-                  ucred.h sys/sysmacros.h])
+                  ucred.h sys/sysmacros.h sys/mkdev.h])
 
 AC_HEADER_TIME
 
diff --git a/g13/sh-dmcrypt.c b/g13/sh-dmcrypt.c
index c5489c96f..09c4d967b 100644
--- a/g13/sh-dmcrypt.c
+++ b/g13/sh-dmcrypt.c
@@ -25,6 +25,9 @@
 #include <errno.h>
 #include <assert.h>
 #include <sys/types.h>
+#ifdef HAVE_SYS_MKDEV_H
+#include <sys/mkdev.h>
+#endif
 #ifdef HAVE_SYS_SYSMACROS_H
 # include <sys/sysmacros.h>
 #endif