diff --git a/utils.cpp b/utils.cpp
index 7744868..4e91a7d 100644
--- a/utils.cpp
+++ b/utils.cpp
@@ -43,7 +43,7 @@
                    const internal::DlSysInterface* sys)
 {
     std::unordered_set<HandlerFactory> seen;
-    void* libHandle = NULL;
+    void* libHandle = nullptr;
     HandlerFactory factory;
 
     std::vector<std::string> libs = getLibraryList(path, matchBlobHandler);