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-rw-r--r--src/stdlib/mblen.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/stdlib/mblen.c b/src/stdlib/mblen.c
index 42188418..57f64790 100644
--- a/src/stdlib/mblen.c
+++ b/src/stdlib/mblen.c
@@ -6,6 +6,7 @@
int mblen(const char * s, size_t n)
{
SIGNAL_SAFE(0);
+ ASSERT_CTYPE(s);
/* FIXME: forward dependency on AMD1 */
#if 0