diff --git a/include/exec/user/thunk.h b/include/exec/user/thunk.h
index 6eedef48d8..2ebfecf58e 100644
--- a/include/exec/user/thunk.h
+++ b/include/exec/user/thunk.h
@@ -111,8 +111,7 @@ static inline int thunk_type_size(const argtype *type_ptr, int is_host)
         if (is_host) {
 #if defined(HOST_X86_64)
             return 8;
-#elif defined(HOST_ALPHA) || defined(HOST_IA64) || defined(HOST_MIPS) || \
-      defined(HOST_PARISC) || defined(HOST_SPARC64)
+#elif defined(HOST_MIPS) || defined(HOST_SPARC64)
             return 4;
 #elif defined(HOST_PPC)
             return sizeof(void *);