diff --git a/mozglue/baseprofiler/core/platform.cpp b/mozglue/baseprofiler/core/platform.cpp
index b0f849214bfd..033b217df3fa 100644
--- a/mozglue/baseprofiler/core/platform.cpp
+++ b/mozglue/baseprofiler/core/platform.cpp
@@ -92,10 +92,11 @@
 #  define USE_MOZ_STACK_WALK
 #endif
 
-// Mac builds only have frame pointers when MOZ_PROFILING is specified, so
-// FramePointerStackWalk() only works in that case. We don't use MozStackWalk()
-// on Mac.
-#if defined(GP_OS_darwin) && defined(MOZ_PROFILING)
+// Mac builds use FramePointerStackWalk(). Even if we build without
+// frame pointers, we'll still get useful stacks in system libraries
+// because those always have frame pointers.
+// We don't use MozStackWalk() on Mac.
+#if defined(GP_OS_darwin)
 #  define HAVE_NATIVE_UNWIND
 #  define USE_FRAME_POINTER_STACK_WALK
 #endif
diff --git a/tools/profiler/core/platform.cpp b/tools/profiler/core/platform.cpp
index 6ccacd6e1c5e..352a5c1dbd6d 100644
--- a/tools/profiler/core/platform.cpp
+++ b/tools/profiler/core/platform.cpp
@@ -126,10 +126,11 @@
 #  define USE_MOZ_STACK_WALK
 #endif
 
-// Mac builds only have frame pointers when MOZ_PROFILING is specified, so
-// FramePointerStackWalk() only works in that case. We don't use MozStackWalk()
-// on Mac.
-#if defined(GP_OS_darwin) && defined(MOZ_PROFILING)
+// Mac builds use FramePointerStackWalk(). Even if we build without
+// frame pointers, we'll still get useful stacks in system libraries
+// because those always have frame pointers.
+// We don't use MozStackWalk() on Mac.
+#if defined(GP_OS_darwin)
 #  define HAVE_NATIVE_UNWIND
 #  define USE_FRAME_POINTER_STACK_WALK
 #endif