diff --git a/arch/ppc/makecontext.c b/arch/ppc/makecontext.c
index 4a404a4..0633c0f 100644
--- a/arch/ppc/makecontext.c
+++ b/arch/ppc/makecontext.c
@@ -25,7 +25,7 @@ extern void __start_context(void);
 
 
 void
-__makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
+__makecontext(ucontext_t *ucp, void (*func)(), int argc, ...)
 {
 	greg_t *sp;
 	va_list va;
diff --git a/arch/ppc64/makecontext.c b/arch/ppc64/makecontext.c
index a4c1bf9..8a293b5 100644
--- a/arch/ppc64/makecontext.c
+++ b/arch/ppc64/makecontext.c
@@ -25,7 +25,7 @@ extern void __start_context(void);
 
 
 void
-__makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
+__makecontext(ucontext_t *ucp, void (*func)(), int argc, ...)
 {
 	greg_t *sp;
 	va_list va;