diff --git a/build/gen.py b/build/gen.py
index 6e915b8..e814b58 100755
--- a/build/gen.py
+++ b/build/gen.py
@@ -439,6 +439,7 @@
         '-Wall',
         '-Wextra',
         '-Wno-unused-parameter',
+        '-Wrange-loop-analysis',
         '-Wundef',
         '-std=c++17'
     ])
diff --git a/src/gn/analyzer.cc b/src/gn/analyzer.cc
index fd93879..e15c265 100644
--- a/src/gn/analyzer.cc
+++ b/src/gn/analyzer.cc
@@ -183,7 +183,7 @@
     }
   }
 
-  for (const auto& kv : dict->DictItems()) {
+  for (const auto kv : dict->DictItems()) {
     if (kv.first == kFilesKey || kv.first == kAdditonalCompileTargetsKey ||
         kv.first == kTestTargetsKey) {
       continue;