1 files changed, 1 insertions, 1 deletions

diff --git a/mps/code/amcsshe.c b/mps/code/amcsshe.c
index edc76a16deb..646f6c4f90b 100644
--- a/mps/code/amcsshe.c
+++ b/mps/code/amcsshe.c
@@ -41,7 +41,7 @@ static mps_gen_param_s testChain[genCOUNT] = {
 
 
 /* objNULL needs to be odd so that it's ignored in exactRoots. */
-#define objNULL           ((mps_addr_t)0xDECEA5ED)
+#define objNULL           ((mps_addr_t)MPS_WORD_CONST(0xDECEA5ED))
 
 
 static mps_pool_t pool;