diff --git a/libc/Android.bp b/libc/Android.bp
index 1e65fea..23b381d 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -672,7 +672,6 @@
         },
         riscv64: {
             srcs: [
-                "arch-riscv64/string/memset_chk.c",
                 "upstream-freebsd/lib/libc/string/memcmp.c",
                 "upstream-freebsd/lib/libc/string/memcpy.c",
                 "upstream-freebsd/lib/libc/string/memmove.c",
@@ -825,6 +824,11 @@
                 "arch-arm64/string/__memset_chk.S",
             ],
         },
+        riscv64: {
+            srcs: [
+               "arch-riscv64/string/__memset_chk.S",
+            ],
+        },
     },
 }
 
diff --git a/libc/arch-riscv64/string/__memset_chk.S b/libc/arch-riscv64/string/__memset_chk.S
new file mode 100644
index 0000000..a5562cb
--- /dev/null
+++ b/libc/arch-riscv64/string/__memset_chk.S
@@ -0,0 +1,10 @@
+#include <private/bionic_asm.h>
+
+ENTRY(__memset_chk)
+    bleu    a2, a3, 1f
+    call    __memset_chk_fail
+
+1:
+    tail   memset
+END(__memset_chk)
+
diff --git a/libc/arch-riscv64/string/memset_chk.c b/libc/arch-riscv64/string/memset_chk.c
deleted file mode 100644
index bdd15a5..0000000
--- a/libc/arch-riscv64/string/memset_chk.c
+++ /dev/null
@@ -1,9 +0,0 @@
-#include <stdint.h>
-
-extern void* memset(void*, int, size_t);
-extern void* __memset_chk_fail(void*, int, size_t, size_t);
-
-void* __memset_chk(void* dst, int c, size_t n, size_t dst_len) {
-  if (dst_len < n) __memset_chk_fail(dst, c, n, dst_len);
-  return memset(dst, c, n);
-}