diff --git a/target-mips/op_template.c b/target-mips/op_template.c
index 04677cd840..71e30d3ef2 100644
--- a/target-mips/op_template.c
+++ b/target-mips/op_template.c
@@ -54,7 +54,7 @@ void glue(op_load_gpr_T2_gpr, REG) (void)
 #define SET_RESET(treg, tregname)        \
     void glue(op_set, tregname)(void)    \
     {                                    \
-        treg = (int32_t)PARAM1;          \
+        treg = (int32_t)(uint32_t)PARAM1;\
         RETURN();                        \
     }                                    \
     void glue(op_reset, tregname)(void)  \