src/cacheline.c |    2 ++
 src/remark.c    |    1 +
 2 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/cacheline.c b/src/cacheline.c
index 8c6f97b..f395c60 100644
--- a/src/cacheline.c
+++ b/src/cacheline.c
@@ -27,6 +27,8 @@
 #include "getline.h"		/* Gnulib/GNU Libc */
 #include "version-etc.h"	/* Gnulib */
 
+#include <locale.h>
+
 enum {
     HELP_OPT = 256,
     VERSION_OPT
diff --git a/src/remark.c b/src/remark.c
index dcf8327..8998112 100644
--- a/src/remark.c
+++ b/src/remark.c
@@ -44,6 +44,7 @@
 #include "common/intutil.h"
 /* regex-markup */
 #include "remark.h"
+#include <locale.h>
 
 #define PROGRAM "remark"