diff --git a/mozglue/tests/TestBaseProfiler.cpp b/mozglue/tests/TestBaseProfiler.cpp
index 355ffc3b35d3..3b324e430563 100644
--- a/mozglue/tests/TestBaseProfiler.cpp
+++ b/mozglue/tests/TestBaseProfiler.cpp
@@ -40,6 +40,8 @@
 #include <type_traits>
 #include <utility>
 
+#ifdef MOZ_GECKO_PROFILER
+
 MOZ_MAYBE_UNUSED static void SleepMilli(unsigned aMilliseconds) {
 #if defined(_MSC_VER) || defined(__MINGW32__)
   Sleep(aMilliseconds);
@@ -58,8 +60,6 @@ MOZ_MAYBE_UNUSED static void SleepMilli(unsigned aMilliseconds) {
 #endif
 }
 
-#ifdef MOZ_GECKO_PROFILER
-
 using namespace mozilla;
 
 void TestPowerOfTwoMask() {