diff --git a/test/cctest/test-assembler-s390.cc b/test/cctest/test-assembler-s390.cc
index dee8e07..ab6796b 100644
--- a/test/cctest/test-assembler-s390.cc
+++ b/test/cctest/test-assembler-s390.cc
@@ -202,7 +202,7 @@
   __ sll(r13, Operand(10));
 
   v8::internal::byte* bufPos = assm.buffer_pos();
-  ::printf("buffer position = %p", bufPos);
+  ::printf("buffer position = %p", static_cast<void*>(bufPos));
   ::fflush(stdout);
   // OS::DebugBreak();