diff --git a/build/build_config.h b/build/build_config.h
index fc96169..ede6c32 100755
--- a/build/build_config.h
+++ b/build/build_config.h
@@ -74,12 +74,6 @@
 #define OS_POSIX 1
 #endif
 
-// Use tcmalloc
-#if (defined(OS_WIN) || defined(OS_LINUX) || defined(OS_ANDROID)) && \
-    !defined(NO_TCMALLOC)
-#define USE_TCMALLOC 1
-#endif
-
 // Compiler detection.
 #if defined(__GNUC__)
 #define COMPILER_GCC 1
diff --git a/build/config/BUILD.gn b/build/config/BUILD.gn
index f9c54f6..991cbc1 100644
--- a/build/config/BUILD.gn
+++ b/build/config/BUILD.gn
@@ -65,7 +65,9 @@ config("feature_flags") {
   if (use_glib) {
     defines += [ "USE_GLIB=1" ]
   }
-  if (use_allocator != "tcmalloc") {
+  if (use_allocator == "tcmalloc") {
+    defines += [ "USE_TCMALLOC" ]
+  } else {
     defines += [ "NO_TCMALLOC" ]
   }
   if (is_asan || is_lsan || is_tsan || is_msan) {