diff --git a/lib/sbi/sbi_pmu.c b/lib/sbi/sbi_pmu.c
index e0303a7b..a0eb3592 100644
--- a/lib/sbi/sbi_pmu.c
+++ b/lib/sbi/sbi_pmu.c
@@ -270,7 +270,7 @@ static void pmu_ctr_write_hw(uint32_t cidx, uint64_t ival)
 {
 #if __riscv_xlen == 32
 	csr_write_num(CSR_MCYCLE + cidx, 0);
-	csr_write_num(CSR_MCYCLE + cidx, ival & 0xFFFF);
+	csr_write_num(CSR_MCYCLE + cidx, ival & 0xFFFFFFFF);
 	csr_write_num(CSR_MCYCLEH + cidx, ival >> BITS_PER_LONG);
 #else
 	csr_write_num(CSR_MCYCLE + cidx, ival);