diff --git a/src/aarch64/ffi.c b/src/aarch64/ffi.c
index 58d088bb..6c338e1f 100644
--- a/src/aarch64/ffi.c
+++ b/src/aarch64/ffi.c
@@ -383,6 +383,7 @@ is_register_candidate (ffi_type *ty)
   switch (ty->type)
     {
     case FFI_TYPE_VOID:
+      return 0;
     case FFI_TYPE_FLOAT:
     case FFI_TYPE_DOUBLE:
     case FFI_TYPE_LONGDOUBLE: