diff --git a/hdl/arith/hazard3_alu.v b/hdl/arith/hazard3_alu.v
index 01f798d..15bb3f2 100644
--- a/hdl/arith/hazard3_alu.v
+++ b/hdl/arith/hazard3_alu.v
@@ -201,11 +201,11 @@ always @ (*) begin
 		// Zbkb
 		{6'bzzzzz1, ALUOP_PACK   }: result = {op_b[15:0], op_a[15:0]};
 		{6'bzzzzz1, ALUOP_PACKH  }: result = {{W_DATA-16{1'b0}}, op_b[7:0], op_a[7:0]};
-		{6'bzzzzz1, ALUOP_REV_B  }: result = op_a_rev;
+		{6'bzzzzz1, ALUOP_BREV8  }: result = {op_a_rev[7:0], op_a_rev[15:8], op_a_rev[23:16], op_a_rev[31:24]};
 		{6'bzzzzz1, ALUOP_UNZIP  }: result = unzip;
 		{6'bzzzzz1, ALUOP_ZIP    }: result = zip;
 
-		default:                  result = bitwise;
+		default:                    result = bitwise;
 	endcase
 end
 
diff --git a/hdl/hazard3_decode.v b/hdl/hazard3_decode.v
index fa90daf..4b88443 100644
--- a/hdl/hazard3_decode.v
+++ b/hdl/hazard3_decode.v
@@ -285,7 +285,7 @@ always @ (*) begin
 
 	RV_PACK:      if (EXTENSION_ZBKB) begin d_aluop = ALUOP_PACK;                                                          end else begin d_invalid_32bit = 1'b1; end
 	RV_PACKH:     if (EXTENSION_ZBKB) begin d_aluop = ALUOP_PACKH;                                                         end else begin d_invalid_32bit = 1'b1; end
-	RV_REV_B:     if (EXTENSION_ZBKB) begin d_aluop = ALUOP_REV_B;  d_rs2 = X0;                                            end else begin d_invalid_32bit = 1'b1; end
+	RV_BREV8:     if (EXTENSION_ZBKB) begin d_aluop = ALUOP_BREV8;  d_rs2 = X0;                                            end else begin d_invalid_32bit = 1'b1; end
 	RV_UNZIP:     if (EXTENSION_ZBKB) begin d_aluop = ALUOP_UNZIP;  d_rs2 = X0;                                            end else begin d_invalid_32bit = 1'b1; end
 	RV_ZIP:       if (EXTENSION_ZBKB) begin d_aluop = ALUOP_ZIP;    d_rs2 = X0;                                            end else begin d_invalid_32bit = 1'b1; end
 
diff --git a/hdl/hazard3_ops.vh b/hdl/hazard3_ops.vh
index 6c4093e..7260887 100644
--- a/hdl/hazard3_ops.vh
+++ b/hdl/hazard3_ops.vh
@@ -50,7 +50,7 @@ localparam ALUOP_BSET    = 6'h3a;
 
 localparam ALUOP_PACK    = 6'h3b;
 localparam ALUOP_PACKH   = 6'h3c;
-localparam ALUOP_REV_B   = 6'h3d;
+localparam ALUOP_BREV8   = 6'h3d;
 localparam ALUOP_ZIP     = 6'h3e;
 localparam ALUOP_UNZIP   = 6'h3f;
 
diff --git a/hdl/rv_opcodes.vh b/hdl/rv_opcodes.vh
index 7abad71..117291a 100644
--- a/hdl/rv_opcodes.vh
+++ b/hdl/rv_opcodes.vh
@@ -128,7 +128,7 @@ localparam RV_BSETI       = 32'b0010100??????????001?????0010011;
 // Zbkb (basic bit manipulation for crypto) (minus those in Zbb)
 localparam RV_PACK        = 32'b0000100??????????100?????0110011;
 localparam RV_PACKH       = 32'b0000100??????????111?????0110011;
-localparam RV_REV_B       = 32'b011010000111?????101?????0010011;
+localparam RV_BREV8       = 32'b011010000111?????101?????0010011;
 localparam RV_UNZIP       = 32'b000010001111?????101?????0010011;
 localparam RV_ZIP         = 32'b000010001111?????001?????0010011;