diff --git a/src/arch/x86/decoder.cc b/src/arch/x86/decoder.cc
index 930c2b9510..9c4997d6f0 100644
--- a/src/arch/x86/decoder.cc
+++ b/src/arch/x86/decoder.cc
@@ -355,6 +355,7 @@ Decoder::doVexOpcodeState(uint8_t nextByte)
     DPRINTF(Decoder, "Found VEX opcode %#x.\n", nextByte);
 
     emi.opcode.op = nextByte;
+    consumeByte();
 
     switch (emi.opcode.type) {
       case TwoByteOpcode: