diff --git a/target/riscv/cpu_bits.h b/target/riscv/cpu_bits.h
index 70ef443c99..a30317c617 100644
--- a/target/riscv/cpu_bits.h
+++ b/target/riscv/cpu_bits.h
@@ -1078,9 +1078,8 @@ typedef enum CTRType {
                                             MHPMEVENTH_BIT_VSINH | \
                                             MHPMEVENTH_BIT_VUINH)
 
-#define MHPMEVENT_SSCOF_MASK               _ULL(0xFFFF000000000000)
-#define MHPMEVENT_IDX_MASK                 0xFFFFF
-#define MHPMEVENT_SSCOF_RESVD              16
+#define MHPMEVENT_SSCOF_MASK               MAKE_64BIT_MASK(63, 56)
+#define MHPMEVENT_IDX_MASK                 (~MHPMEVENT_SSCOF_MASK)
 
 /* RISC-V-specific interrupt pending bits. */
 #define CPU_INTERRUPT_RNMI                 CPU_INTERRUPT_TGT_EXT_0