diff --git a/libc/private/bionic_ifuncs.h b/libc/private/bionic_ifuncs.h
index 35961fb..f175bec 100644
--- a/libc/private/bionic_ifuncs.h
+++ b/libc/private/bionic_ifuncs.h
@@ -28,10 +28,22 @@
 
 #pragma once
 
+#include <stdint.h>
+#include <sys/ifunc.h>
+
+#if defined(__aarch64__)
+#define IFUNC_ARGS (uint64_t hwcap __attribute__((unused)), \
+                    __ifunc_arg_t* arg __attribute__((unused)))
+#elif defined(__arm__)
+#define IFUNC_ARGS (unsigned long hwcap __attribute__((unused)))
+#else
+#define IFUNC_ARGS ()
+#endif
+
 #define DEFINE_IFUNC_FOR(name) \
     name##_func name __attribute__((ifunc(#name "_resolver"))); \
     __attribute__((visibility("hidden"))) \
-    name##_func* name##_resolver()
+    name##_func* name##_resolver IFUNC_ARGS
 
 #define DECLARE_FUNC(type, name) \
     __attribute__((visibility("hidden"))) \