--- base/trace_event/malloc_dump_provider.cc.orig
+++ base/trace_event/malloc_dump_provider.cc
@@ -243,7 +243,7 @@
   allocated_objects_count = main_heap_info.block_count;
 #elif defined(OS_FUCHSIA)
 // TODO(fuchsia): Port, see https://crbug.com/706592.
-#else
+#elif defined(__GLIBC__)
   struct mallinfo info = mallinfo();
   DCHECK_GE(info.arena + info.hblkhd, info.uordblks);
 
diff --git a/base/process/process_metrics_posix.cc b/base/process/process_metrics_posix.cc
index 0eb5c1f..8af7799 100644
--- base/process/process_metrics_posix.cc
+++ base/process/process_metrics_posix.cc
@@ -94,14 +94,14 @@ size_t ProcessMetrics::GetMallocUsage() {
   malloc_statistics_t stats = {0};
   malloc_zone_statistics(nullptr, &stats);
   return stats.size_in_use;
-#elif defined(OS_LINUX) || defined(OS_ANDROID)
+#elif defined(__GLIBC__) || defined(OS_ANDROID)
   struct mallinfo minfo = mallinfo();
 #if defined(USE_TCMALLOC)
   return minfo.uordblks;
 #else
   return minfo.hblkhd + minfo.arena;
 #endif
-#elif defined(OS_FUCHSIA)
+#else
   // TODO(fuchsia): Not currently exposed. https://crbug.com/735087.
   return 0;
 #endif