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-rw-r--r--lib/mbslen.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/mbslen.c b/lib/mbslen.c
index 41c219f54c..9dae4172ab 100644
--- a/lib/mbslen.c
+++ b/lib/mbslen.c
@@ -21,6 +21,8 @@
/* Specification. */
#include <string.h>
+#include <stdlib.h>
+
#if HAVE_MBRTOWC
# include "mbuiter.h"
#endif