diff --git a/project.gyp b/project.gyp
index 4ed51809..4e1ae182 100644
--- a/project.gyp
+++ b/project.gyp
@@ -132,6 +132,7 @@
         'xcode_settings': {
           'OTHER_LDFLAGS': ['-g'],
           'GCC_OPTIMIZATION_LEVEL': '0',
+          'OTHER_CPLUSPLUSFLAGS': ['-fsanitize=address'],
         },
       },
       'Release': {
diff --git a/tests.gyp b/tests.gyp
index 770ec9d8..dedde1ba 100644
--- a/tests.gyp
+++ b/tests.gyp
@@ -45,6 +45,7 @@
       'xcode_settings': {
         'CLANG_CXX_LANGUAGE_STANDARD': 'c++14',
         'OTHER_LDFLAGS': ['-g'],
+        'OTHER_CPLUSPLUSFLAGS': ['-fsanitize=address'],
         'GCC_OPTIMIZATION_LEVEL': '0',
         'ALWAYS_SEARCH_USER_PATHS': 'NO',
         'WARNING_CFLAGS': [