diff --git a/zerostoragecaptcha.cpp b/zerostoragecaptcha.cpp
index 1dab712..a7ad086 100644
--- a/zerostoragecaptcha.cpp
+++ b/zerostoragecaptcha.cpp
@@ -297,11 +297,11 @@ void TimeToken::init()
     m_updater->start();
 }
 
-std::atomic<size_t> IdCounter::counter = 0;
+std::atomic<size_t> IdCounter::m_counter = 0;
 
 size_t IdCounter::get()
 {
-    size_t value = ++counter;
+    size_t value = ++m_counter;
     if (value == 0)
     {
         value++;
diff --git a/zerostoragecaptcha.h b/zerostoragecaptcha.h
index 9be714b..1e8deb1 100644
--- a/zerostoragecaptcha.h
+++ b/zerostoragecaptcha.h
@@ -137,7 +137,7 @@ public:
     static size_t get();
 
 private:
-    static std::atomic<size_t> counter;
+    static std::atomic<size_t> m_counter;
 };
 
 class TokenManager