diff --git a/compiler/riscv64/cgcpu.pas b/compiler/riscv64/cgcpu.pas
index 6399726359..2ee985fe2d 100644
--- a/compiler/riscv64/cgcpu.pas
+++ b/compiler/riscv64/cgcpu.pas
@@ -102,6 +102,8 @@ implementation
           list.Concat(taicpu.op_reg_reg_const(A_ADDIW,reg2,reg1,0))
         else if (tosize=OS_S32) and (tcgsize2unsigned[fromsize]=OS_64) then
           list.Concat(taicpu.op_reg_reg_const(A_ADDIW,reg2,reg1,0))
+        else if (CPURV_HAS_ZBA in cpu_capabilities[current_settings.cputype]) and (tosize=OS_32) and (tcgsize2unsigned[fromsize]=OS_64) then
+          list.Concat(taicpu.op_reg_reg(A_ZEXT_W,reg2,reg1))
         else if (CPURV_HAS_ZBB in cpu_capabilities[current_settings.cputype]) and (tcgsize2unsigned[tosize]=OS_64) and (fromsize=OS_S16) then
           list.Concat(taicpu.op_reg_reg(A_SEXT_H,reg2,reg1))
         else if (CPURV_HAS_ZBB in cpu_capabilities[current_settings.cputype]) and (tosize=OS_S16) and (tcgsize2unsigned[fromsize]=OS_64) then