diff --git a/src/internal/syscall/unix/at_sysnum_fstatat_linux.go b/src/internal/syscall/unix/at_sysnum_fstatat_linux.go
index 580e7997f8d192..31fe6a5a7b56e7 100644
--- a/src/internal/syscall/unix/at_sysnum_fstatat_linux.go
+++ b/src/internal/syscall/unix/at_sysnum_fstatat_linux.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build arm64
+// +build arm64 riscv64
 
 package unix
 
diff --git a/src/internal/syscall/unix/getrandom_linux_generic.go b/src/internal/syscall/unix/getrandom_linux_generic.go
index f8490ce97857c7..e69bf6b675ed5c 100644
--- a/src/internal/syscall/unix/getrandom_linux_generic.go
+++ b/src/internal/syscall/unix/getrandom_linux_generic.go
@@ -2,15 +2,15 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build linux,arm64
+// +build linux
+// +build arm64 riscv64
 
 package unix
 
 // Linux getrandom system call number.
 // See GetRandom in getrandom_linux.go.
 //
-// This file is named "generic" because at a certain point Linux
-// started standardizing on system call numbers across
-// architectures. So far this means only arm64 uses the standard
-// numbers.
+// This file is named "generic" because at a certain point Linux started
+// standardizing on system call numbers across architectures. So far this means
+// only arm64 and riscv64 use the standard numbers.
 const randomTrap uintptr = 278