diff --git a/src/base/bittorrent/session.cpp b/src/base/bittorrent/session.cpp
index 9c08c15ae..1e8a665d7 100644
--- a/src/base/bittorrent/session.cpp
+++ b/src/base/bittorrent/session.cpp
@@ -180,7 +180,7 @@ namespace
         {
         }
 
-        T operator()(T val)
+        T operator()(T val) const
         {
             return val <= m_limit ? m_ret : val;
         }
diff --git a/src/base/bittorrent/trackerentry.cpp b/src/base/bittorrent/trackerentry.cpp
index 14f98e738..824f8f1ba 100644
--- a/src/base/bittorrent/trackerentry.cpp
+++ b/src/base/bittorrent/trackerentry.cpp
@@ -84,7 +84,7 @@ TrackerEntry &TrackerEntry::operator=(const TrackerEntry &other)
     return *this;
 }
 
-bool TrackerEntry::operator==(const TrackerEntry &other)
+bool TrackerEntry::operator==(const TrackerEntry &other) const
 {
     return (QUrl(url()) == QUrl(other.url()));
 }
diff --git a/src/base/bittorrent/trackerentry.h b/src/base/bittorrent/trackerentry.h
index f9d2187c4..fcaf9af7d 100644
--- a/src/base/bittorrent/trackerentry.h
+++ b/src/base/bittorrent/trackerentry.h
@@ -60,7 +60,7 @@ namespace BitTorrent
 
         void setTier(int value);
         TrackerEntry &operator=(const TrackerEntry &other);
-        bool operator==(const TrackerEntry &other);
+        bool operator==(const TrackerEntry &other) const;
 
         libtorrent::announce_entry nativeEntry() const;