diff --git a/ap/libc/glibc/glibc-2.23/string/bug-strcoll1.c b/ap/libc/glibc/glibc-2.23/string/bug-strcoll1.c
new file mode 100644
index 0000000..b6510d9
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/string/bug-strcoll1.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include <string.h>
+#include <locale.h>
+
+int
+main (void)
+{
+  const char t1[] = "0-0-0-0-0-0-0-0-0-0.COM";
+  const char t2[] = "00000-00000.COM";
+  int res1;
+  int res2;
+
+  setlocale (LC_ALL, "en_US.ISO-8859-1");
+
+  res1 = strcoll (t1, t2);
+  printf ("strcoll (\"%s\", \"%s\") = %d\n", t1, t2, res1);
+  res2 = strcoll (t2, t1);
+  printf ("strcoll (\"%s\", \"%s\") = %d\n", t2, t1, res2);
+
+  return ((res1 == 0 && res2 != 0)
+	  || (res1 != 0 && res2 == 0)
+	  || (res1 < 0 && res2 < 0)
+	  || (res1 > 0 && res2 > 0));
+}