diff --git a/src/app/test/testopcode.cpp b/src/app/test/testopcode.cpp
index 582e8b2..dd5332b 100644
--- a/src/app/test/testopcode.cpp
+++ b/src/app/test/testopcode.cpp
@@ -6,7 +6,7 @@
 
 // This file is used to test opcodes generated by AsmJit. Output can be
 // disassembled in your IDE or by your favourite disassembler. Instructions
-// are sorted alphabetically.
+// are grouped by category and then sorted alphabetically.
 
 // [Dependencies - AsmJit]
 #include <asmjit/asmjit.h>
diff --git a/src/asmjit/x86/x86assembler.cpp b/src/asmjit/x86/x86assembler.cpp
index faa676e..7ca6802 100644
--- a/src/asmjit/x86/x86assembler.cpp
+++ b/src/asmjit/x86/x86assembler.cpp
@@ -3180,13 +3180,15 @@ _EmitX86M:
   mIndex = rmMem->getIndex();
 
   // Size override prefix.
-  if (Arch == kArchX86) {
-    if (rmMem->getMemType() != kMemTypeLabel && !rmMem->hasGpdBase())
-      EMIT_BYTE(0x67);
-  }
-  else {
-    if (rmMem->getMemType() != kMemTypeLabel && rmMem->hasGpdBase())
-      EMIT_BYTE(0x67);
+  if (rmMem->hasBaseOrIndex()) {
+    if (Arch == kArchX86) {
+      if (!rmMem->hasGpdBase())
+        EMIT_BYTE(0x67);
+    }
+    else {
+      if (rmMem->hasGpdBase())
+        EMIT_BYTE(0x67);
+    }
   }
 
   // Segment override prefix.
diff --git a/src/asmjit/x86/x86defs.h b/src/asmjit/x86/x86defs.h
index a38f5b8..edcbfe8 100644
--- a/src/asmjit/x86/x86defs.h
+++ b/src/asmjit/x86/x86defs.h
@@ -2685,12 +2685,14 @@ struct Mem : public BaseMem {
   // --------------------------------------------------------------------------
 
   //! @brief Get whether the memory operand has base register.
-  ASMJIT_INLINE bool hasBase() const
-  { return _vmem.base != kInvalidValue; }
+  ASMJIT_INLINE bool hasBase() const {
+    return _vmem.base != kInvalidValue;
+  }
 
   //! @brief Get memory operand base register code, variable id, or @ref kInvalidValue.
-  ASMJIT_INLINE uint32_t getBase() const
-  { return _vmem.base; }
+  ASMJIT_INLINE uint32_t getBase() const {
+    return _vmem.base;
+  }
 
   //! @brief Set memory operand base register code, variable id, or @ref kInvalidValue.
   ASMJIT_INLINE Mem& setBase(uint32_t base) {
@@ -2796,6 +2798,20 @@ struct Mem : public BaseMem {
     return _setVSib(kMemVSibGpz);
   }
 
+  // --------------------------------------------------------------------------
+  // [Misc]
+  // --------------------------------------------------------------------------
+
+  //! @brief Get whether the memory operand has base and index register.
+  ASMJIT_INLINE bool hasBaseOrIndex() const {
+    return _vmem.base != kInvalidValue || _vmem.index != kInvalidValue;
+  }
+
+  //! @brief Get whether the memory operand has base and index register.
+  ASMJIT_INLINE bool hasBaseAndIndex() const {
+    return _vmem.base != kInvalidValue && _vmem.index != kInvalidValue;
+  }
+
   // --------------------------------------------------------------------------
   // [Shift]
   // --------------------------------------------------------------------------