diff --git a/src/cmd/internal/obj/loong64/asm.go b/src/cmd/internal/obj/loong64/asm.go
index 8f07435029..1616d3be50 100644
--- a/src/cmd/internal/obj/loong64/asm.go
+++ b/src/cmd/internal/obj/loong64/asm.go
@@ -2774,7 +2774,7 @@ func (c *ctxt0) asmout(p *obj.Prog, o *Optab, out []uint32) {
 		}
 
 		if blkNums > 256 {
-			c.ctxt.Diag("%v: block_nums amount out of range[1, 256]: %v\n", p, blkSize)
+			c.ctxt.Diag("%v: block_nums amount out of range[1, 256]: %v\n", p, blkNums)
 		}
 
 		v := (uint64(offs) & 0xffff)