diff --git a/libc/string/strrchr.c b/libc/string/strrchr.c
index 10c07e6..fc3dc4e 100644
--- a/libc/string/strrchr.c
+++ b/libc/string/strrchr.c
@@ -29,13 +29,19 @@
  */
 
 #include <string.h>
+#include <private/logd.h>
 
 char *
-strrchr(const char *p, int ch)
+__strrchr_chk(const char *p, int ch, size_t s_len)
 {
 	char *save;
 
-	for (save = NULL;; ++p) {
+	for (save = NULL;; ++p, s_len--) {
+		if (s_len == 0) {
+			__libc_android_log_print(ANDROID_LOG_FATAL, "libc",
+				"*** FORTIFY_SOURCE strrchr read beyond buffer ***\n");
+			abort();
+		}
 		if (*p == (char) ch)
 			save = (char *)p;
 		if (!*p)
@@ -43,3 +49,9 @@
 	}
 	/* NOTREACHED */
 }
+
+char *
+strrchr(const char *p, int ch)
+{
+	return __strrchr_chk(p, ch, (size_t) -1);
+}