diff --git a/gcc/config/riscv/multilib-generator b/gcc/config/riscv/multilib-generator
index 53c51dfa53f..ccfd9ea18ea 100755
--- a/gcc/config/riscv/multilib-generator
+++ b/gcc/config/riscv/multilib-generator
@@ -54,7 +54,8 @@ def arch_canonicalize(arch):
   this_file = os.path.abspath(os.path.join( __file__))
   arch_can_script = \
     os.path.join(os.path.dirname(this_file), "arch-canonicalize")
-  proc = subprocess.Popen([arch_can_script, arch], stdout=subprocess.PIPE)
+  proc = subprocess.Popen([sys.executable, arch_can_script, arch],
+                          stdout=subprocess.PIPE)
   out, err = proc.communicate()
   return out.strip()