diff --git a/js/src/assembler/assembler/ARMAssembler.h b/js/src/assembler/assembler/ARMAssembler.h
index 44c2e3f46f31..682a6365ecd0 100644
--- a/js/src/assembler/assembler/ARMAssembler.h
+++ b/js/src/assembler/assembler/ARMAssembler.h
@@ -132,7 +132,7 @@ namespace JSC {
     class ARMAssembler {
     public:
         
-#ifdef DEBUG
+#ifdef JS_METHODJIT_SPEW
         bool isOOLPath;
         // Assign a default value to keep Valgrind quiet.
         ARMAssembler() : isOOLPath(false) { }
diff --git a/js/src/assembler/assembler/X86Assembler.h b/js/src/assembler/assembler/X86Assembler.h
index 2a373769c27b..6147ab95dc36 100644
--- a/js/src/assembler/assembler/X86Assembler.h
+++ b/js/src/assembler/assembler/X86Assembler.h
@@ -307,7 +307,7 @@ private:
     class X86InstructionFormatter;
 public:
 
-#ifdef DEBUG
+#ifdef JS_METHODJIT_SPEW
     bool isOOLPath;
 #endif
 
@@ -355,7 +355,7 @@ public:
     };
 
     X86Assembler()
-#ifdef DEBUG
+#ifdef JS_METHODJIT_SPEW
       : isOOLPath(false)
 #endif
     {