diff --git a/lib/msun/riscv/fenv.h b/lib/msun/riscv/fenv.h
index f9d840d156fa..6c8c2861bc97 100644
--- a/lib/msun/riscv/fenv.h
+++ b/lib/msun/riscv/fenv.h
@@ -186,7 +186,7 @@ fegetenv(fenv_t *__envp)
 }
 
 __fenv_static inline int
-feholdexcept(fenv_t *__envp)
+feholdexcept(fenv_t *__envp __unused)
 {
 
 	/* No exception traps. */
@@ -226,7 +226,7 @@ int fedisableexcept(int __mask);
 int fegetexcept(void);
 #else
 static inline int
-feenableexcept(int __mask)
+feenableexcept(int __mask __unused)
 {
 
 	/* No exception traps. */
@@ -235,7 +235,7 @@ feenableexcept(int __mask)
 }
 
 static inline int
-fedisableexcept(int __mask)
+fedisableexcept(int __mask __unused)
 {
 
 	/* No exception traps. */