diff --git a/src/hotspot/cpu/s390/downcallLinker_s390.cpp b/src/hotspot/cpu/s390/downcallLinker_s390.cpp
index 383a3244874..85ddc5bf185 100644
--- a/src/hotspot/cpu/s390/downcallLinker_s390.cpp
+++ b/src/hotspot/cpu/s390/downcallLinker_s390.cpp
@@ -36,8 +36,8 @@
 
 #define __ _masm->
 
-static const int native_invoker_code_base_size = 512;
-static const int native_invoker_size_per_args = 8;
+static const int native_invoker_code_base_size = 384;
+static const int native_invoker_size_per_args = 12;
 
 RuntimeStub* DowncallLinker::make_downcall_stub(BasicType* signature,
                                                 int num_args,