diff --git a/arch/PowerPC/PPCInstPrinter.c b/arch/PowerPC/PPCInstPrinter.c
index 430225f..60e336a 100644
--- a/arch/PowerPC/PPCInstPrinter.c
+++ b/arch/PowerPC/PPCInstPrinter.c
@@ -117,7 +117,7 @@
 	}
 
 	if ((MCInst_getOpcode(MI) == PPC_OR || MCInst_getOpcode(MI) == PPC_OR8) &&
-			MCOperand_getReg(MCInst_getOperand(MI, 1)) == MCOperand_getReg(MCInst_getOperand(MI, 1))) {
+			MCOperand_getReg(MCInst_getOperand(MI, 1)) == MCOperand_getReg(MCInst_getOperand(MI, 2))) {
 		SStream_concat0(O, "mr\t");
 		MCInst_setOpcodePub(MI, PPC_INS_MR);
 		printOperand(MI, 0, O);