diff --git a/Source/JavaScriptCore/bytecode/BytecodeConventions.h b/Source/JavaScriptCore/bytecode/BytecodeConventions.h
index 6b1c50b..7781378 100644
--- a/Source/JavaScriptCore/bytecode/BytecodeConventions.h
+++ b/Source/JavaScriptCore/bytecode/BytecodeConventions.h
@@ -23,14 +23,10 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
-#ifndef BytecodeConventions_h
-#define BytecodeConventions_h
+#pragma once
 
 // Register numbers used in bytecode operations have different meaning according to their ranges:
 //      0x80000000-0xFFFFFFFF  Negative indices from the CallFrame pointer are entries in the call frame.
 //      0x00000000-0x3FFFFFFF  Forwards indices from the CallFrame pointer are local vars and temporaries with the function's callframe.
 //      0x40000000-0x7FFFFFFF  Positive indices from 0x40000000 specify entries in the constant pool on the CodeBlock.
 static const int FirstConstantRegisterIndex = 0x40000000;
-
-#endif // BytecodeConventions_h
-