diff --git a/libc/tools/gensyscalls.py b/libc/tools/gensyscalls.py
index baaa52d..d3e6ef4 100755
--- a/libc/tools/gensyscalls.py
+++ b/libc/tools/gensyscalls.py
@@ -15,7 +15,7 @@
 import tempfile
 
 
-SupportedArchitectures = [ "arm", "arm64", "x86", "x86_64" ]
+SupportedArchitectures = [ "arm", "arm64", "riscv64", "x86", "x86_64" ]
 
 syscall_stub_header = \
 """
@@ -80,6 +80,24 @@
 
 
 #
+# RISC-V64 assembler templates for each syscall stub
+#
+
+riscv64_call = syscall_stub_header + """\
+    li      a7, %(__NR_name)s
+    ecall
+
+    li      a7, -MAX_ERRNO
+    bgtu    a0, a7, 1f
+
+    ret
+1:
+    neg     a0, a0
+    j       __set_errno_internal
+END(%(func)s)
+"""
+
+#
 # x86 assembler templates for each syscall stub
 #
 
@@ -228,6 +246,10 @@
     return arm64_call % syscall
 
 
+def riscv64_genstub(syscall):
+    return riscv64_call % syscall
+
+
 def x86_genstub(syscall):
     result     = syscall_stub_header % syscall
 
@@ -440,6 +462,9 @@
         if "arm64" in syscall:
             syscall["asm-arm64"] = add_footer(64, arm64_genstub(syscall), syscall)
 
+        if "riscv64" in syscall:
+            syscall["asm-riscv64"] = add_footer(64, riscv64_genstub(syscall), syscall)
+
         if "x86" in syscall:
             if syscall["socketcall_id"] >= 0:
                 syscall["asm-x86"] = add_footer(32, x86_genstub_socketcall(syscall), syscall)