diff --git a/config/autoconf.mk.in b/config/autoconf.mk.in
index d456dbfe4b..dda684473d 100644
--- a/config/autoconf.mk.in
+++ b/config/autoconf.mk.in
@@ -97,7 +97,6 @@ MOZ_DEBUG_FLAGS	= @MOZ_DEBUG_FLAGS@
 MOZ_DEBUG_LDFLAGS=@MOZ_DEBUG_LDFLAGS@
 MOZ_DBGRINFO_MODULES	= @MOZ_DBGRINFO_MODULES@
 MOZ_JSDEBUGGER  = @MOZ_JSDEBUGGER@
-MOZ_PERF_METRICS = @MOZ_PERF_METRICS@
 MOZ_LEAKY	= @MOZ_LEAKY@
 MOZ_MEMORY      = @MOZ_MEMORY@
 MOZ_JPROF       = @MOZ_JPROF@
diff --git a/configure.in b/configure.in
index ade47f1ea5..ff42f2c0c8 100644
--- a/configure.in
+++ b/configure.in
@@ -6157,17 +6157,6 @@ if test -n "$MOZ_REFLOW_PREF"; then
 fi
 AC_SUBST(MOZ_REFLOW_PERF)
 
-dnl ========================================================
-dnl Enable performance metrics.
-dnl ========================================================
-MOZ_ARG_ENABLE_BOOL(perf-metrics,
-[  --enable-perf-metrics   Enable performance metrics],
-    MOZ_PERF_METRICS=1,
-    MOZ_PERF_METRICS= )
-if test -n "$MOZ_PERF_METRICS"; then
-    AC_DEFINE(MOZ_PERF_METRICS)
-fi
-
 dnl ========================================================
 dnl Enable code size metrics.
 dnl ========================================================
@@ -6935,7 +6924,6 @@ AC_SUBST(MOZ_PLUGINS)
 AC_SUBST(ENABLE_EAZEL_PROFILER)
 AC_SUBST(EAZEL_PROFILER_CFLAGS)
 AC_SUBST(EAZEL_PROFILER_LIBS)
-AC_SUBST(MOZ_PERF_METRICS)
 AC_SUBST(GC_LEAK_DETECTOR)
 AC_SUBST(MOZ_LOG_REFCNT)
 AC_SUBST(MOZ_LEAKY)