diff --git a/js/src/Makefile.in b/js/src/Makefile.in
index f3ee0b37f211..f3092dc138de 100644
--- a/js/src/Makefile.in
+++ b/js/src/Makefile.in
@@ -338,7 +338,7 @@ CPPSRCS += 	ExecutableAllocator.cpp \
 		YarrSyntaxChecker.cpp \
 		$(NONE)
 
-ifdef MOZ_DEBUG
+ifdef ENABLE_METHODJIT_SPEW
 CPPSRCS += Logging.cpp
 endif
 
diff --git a/js/src/config/autoconf.mk.in b/js/src/config/autoconf.mk.in
index 865c9dcf092c..f5aede8f4138 100644
--- a/js/src/config/autoconf.mk.in
+++ b/js/src/config/autoconf.mk.in
@@ -329,6 +329,7 @@ VISIBILITY_FLAGS = @VISIBILITY_FLAGS@
 WRAP_SYSTEM_INCLUDES = @WRAP_SYSTEM_INCLUDES@
 
 ENABLE_METHODJIT = @ENABLE_METHODJIT@
+ENABLE_METHODJIT_SPEW = @ENABLE_METHODJIT_SPEW@
 HAVE_ARM_SIMD= @HAVE_ARM_SIMD@
 
 JS_SHARED_LIBRARY = @JS_SHARED_LIBRARY@
diff --git a/js/src/configure.in b/js/src/configure.in
index e531adf8691b..7d02f29e004d 100644
--- a/js/src/configure.in
+++ b/js/src/configure.in
@@ -2668,6 +2668,7 @@ MOZ_ARG_ENABLE_BOOL(methodjit-spew,
   ENABLE_METHODJIT_SPEW= )
 
 AC_SUBST(ENABLE_METHODJIT)
+AC_SUBST(ENABLE_METHODJIT_SPEW)
 
 if test "$ENABLE_METHODJIT"; then
     AC_DEFINE(JS_METHODJIT)
@@ -2685,10 +2686,6 @@ if test "$ENABLE_METHODJIT_TYPED_ARRAY"; then
     AC_DEFINE(JS_METHODJIT_TYPED_ARRAY)
 fi
 
-if test "$ENABLE_METHODJIT_SPEW"; then
-    AC_DEFINE(JS_METHODJIT_SPEW)
-fi
-
 if test -z "$SKIP_COMPILER_CHECKS"; then
 dnl Checks for typedefs, structures, and compiler characteristics.
 dnl ========================================================
@@ -3882,6 +3879,7 @@ MOZ_ARG_ENABLE_STRING(debug,
                            (using compiler flags DBG)],
 [ if test "$enableval" != "no"; then
     MOZ_DEBUG=1
+    ENABLE_METHODJIT_SPEW=1
     if test -n "$enableval" -a "$enableval" != "yes"; then
         MOZ_DEBUG_FLAGS=`echo $enableval | sed -e 's|\\\ | |g'`
         _MOZ_DEBUG_FLAGS_SET=1
@@ -3917,6 +3915,10 @@ if test -n "$MOZ_DEBUG"; then
     CFLAGS=$_SAVE_CFLAGS
 fi
 
+if test "$ENABLE_METHODJIT_SPEW"; then
+    AC_DEFINE(JS_METHODJIT_SPEW)
+fi
+
 dnl ========================================================
 dnl = Enable code optimization. ON by default.
 dnl ========================================================
diff --git a/js/src/jsanalyze.cpp b/js/src/jsanalyze.cpp
index 5fd317a92b47..1090db8b2cd0 100644
--- a/js/src/jsanalyze.cpp
+++ b/js/src/jsanalyze.cpp
@@ -978,7 +978,7 @@ ScriptAnalysis::analyzeLifetimes(JSContext *cx)
     ranLifetimes_ = true;
 }
 
-#ifdef DEBUG
+#ifdef JS_METHODJIT_SPEW
 void
 LifetimeVariable::print() const
 {
diff --git a/js/src/jsanalyze.h b/js/src/jsanalyze.h
index 057a0c645b8b..6fb6ee0de189 100644
--- a/js/src/jsanalyze.h
+++ b/js/src/jsanalyze.h
@@ -612,7 +612,7 @@ struct LifetimeVariable
         return offset;
     }
 
-#ifdef DEBUG
+#ifdef JS_METHODJIT_SPEW
     void print() const;
 #endif
 };