diff --git a/src/diagnostics/x64/disasm-x64.cc b/src/diagnostics/x64/disasm-x64.cc
index 7347ab712d..9b978be8c0 100644
--- a/src/diagnostics/x64/disasm-x64.cc
+++ b/src/diagnostics/x64/disasm-x64.cc
@@ -1684,6 +1684,7 @@ int DisassemblerX64::TwoByteOpcodeInstruction(byte* data) {
 
         SSSE3_INSTRUCTION_LIST(SSE34_DIS_CASE)
         SSE4_INSTRUCTION_LIST(SSE34_DIS_CASE)
+        SSE4_2_INSTRUCTION_LIST(SSE34_DIS_CASE)
 #undef SSE34_DIS_CASE
         default:
           UnimplementedInstruction();
diff --git a/test/cctest/test-disasm-x64.cc b/test/cctest/test-disasm-x64.cc
index 15c043a784..a571bf9c6a 100644
--- a/test/cctest/test-disasm-x64.cc
+++ b/test/cctest/test-disasm-x64.cc
@@ -606,6 +606,14 @@ TEST(DisasmX64) {
       SSE4_INSTRUCTION_LIST(EMIT_SSE34_INSTR)
     }
   }
+
+  {
+    if (CpuFeatures::IsSupported(SSE4_2)) {
+      CpuFeatureScope scope(&assm, SSE4_2);
+
+      SSE4_2_INSTRUCTION_LIST(EMIT_SSE34_INSTR)
+    }
+  }
 #undef EMIT_SSE34_INSTR
 
   // AVX instruction