diff --git a/libbb/compare_string_array.c b/libbb/compare_string_array.c
index 731d3d8..7b5ce85 100644
--- a/libbb/compare_string_array.c
+++ b/libbb/compare_string_array.c
@@ -67,3 +67,12 @@
 	}
 	return -1;
 }
+
+const char *nth_string(const char *strings, int n)
+{
+        while (n) {
+                n--;
+                strings += strlen(strings) + 1;
+        }
+        return strings;
+}