diff --git a/IBM360/ibm360_cpu.c b/IBM360/ibm360_cpu.c
index b789ece..75daba8 100644
--- a/IBM360/ibm360_cpu.c
+++ b/IBM360/ibm360_cpu.c
@@ -4181,7 +4181,7 @@ lpsw:
  * return 1 if error.
  * return 0 if ok.
  */
-int dec_load(uint8 *data, uint32 addr, uint len, int *sign)
+int dec_load(uint8 *data, uint32 addr, int len, int *sign)
 {
     uint32   temp;
     int      i, j;
@@ -4224,7 +4224,7 @@ int dec_load(uint8 *data, uint32 addr, uint len, int *sign)
  * return 1 if error.
  * return 0 if ok.
  */
-int dec_store(uint8 *data, uint32 addr, uint len, int sign)
+int dec_store(uint8 *data, uint32 addr, int len, int sign)
 {
     uint32   temp;
     int      i, j;