diff --git a/arch/PowerPC/PPCDisassembler.c b/arch/PowerPC/PPCDisassembler.c
index 82940738..f7dc48ba 100644
--- a/arch/PowerPC/PPCDisassembler.c
+++ b/arch/PowerPC/PPCDisassembler.c
@@ -316,6 +316,8 @@ static DecodeStatus decodeCRBitMOperand(MCInst *Inst, uint64_t Imm,
 
 	unsigned Zeros = CountTrailingZeros_64(Imm);
 	// assert(Zeros < 8 && "Invalid CR bit value");
+	if (Zeros >=8)
+		return MCDisassembler_Fail;
 
 	MCOperand_CreateReg0(Inst, CRRegs[7 - Zeros]);
 	return MCDisassembler_Success;