diff --git a/qrtplib/rtpaddress.cpp b/qrtplib/rtpaddress.cpp
index 28b5979f4..d32ca4a11 100644
--- a/qrtplib/rtpaddress.cpp
+++ b/qrtplib/rtpaddress.cpp
@@ -77,7 +77,7 @@ bool RTPAddress::IsFromSameHost(const RTPAddress *addr) const
     return addr->address == address;
 }
 
-bool RTPAddress::operator==(const RTPAddress& otherAddress)
+bool RTPAddress::operator==(const RTPAddress& otherAddress) const
 {
     return IsSameAddress(&otherAddress);
 }
diff --git a/qrtplib/rtpaddress.h b/qrtplib/rtpaddress.h
index 3d69f3941..aaee32cc0 100644
--- a/qrtplib/rtpaddress.h
+++ b/qrtplib/rtpaddress.h
@@ -94,7 +94,7 @@ public:
     bool IsFromSameHost(const RTPAddress *addr) const;
 
     /** Equality */
-    bool operator==(const RTPAddress& otherAddress);
+    bool operator==(const RTPAddress& otherAddress) const;
 
     /** Get host address */
     const QHostAddress& getAddress() const