diff --git a/libcockatrice_card/libcockatrice/card/card_info.cpp b/libcockatrice_card/libcockatrice/card/card_info.cpp
index 5302a4bd2..786e17950 100644
--- a/libcockatrice_card/libcockatrice/card/card_info.cpp
+++ b/libcockatrice_card/libcockatrice/card/card_info.cpp
@@ -25,7 +25,11 @@ const QHash<QString, QString> &CardInfo::getPropertiesHash() const
 
 void CardInfo::setProperty(const QString &_name, const QString &_value)
 {
-    properties.insert(_name, _value);
+    bool changed = properties.insert(_name, _value);
+    if (!changed) {
+        return;
+    }
+
     emit cardInfoChanged(smartThis);
 }
 
diff --git a/libcockatrice_card/libcockatrice/card/lazy_properties_hash.cpp b/libcockatrice_card/libcockatrice/card/lazy_properties_hash.cpp
index dfbcf1b06..4d903a3bd 100644
--- a/libcockatrice_card/libcockatrice/card/lazy_properties_hash.cpp
+++ b/libcockatrice_card/libcockatrice/card/lazy_properties_hash.cpp
@@ -76,10 +76,16 @@ QString LazyPropertiesHash::value(const QString &key) const
     return properties.value(key);
 }
 
-void LazyPropertiesHash::insert(const QString &key, const QString &value)
+bool LazyPropertiesHash::insert(const QString &key, const QString &value)
 {
     ensureMaterialized();
+
+    if (value == properties.value(key)) {
+        return false;
+    }
+
     properties.insert(key, value);
+    return true;
 }
 
 const QHash<QString, QString> &LazyPropertiesHash::getProperties() const
diff --git a/libcockatrice_card/libcockatrice/card/lazy_properties_hash.h b/libcockatrice_card/libcockatrice/card/lazy_properties_hash.h
index 5d07070a7..0ed8c215b 100644
--- a/libcockatrice_card/libcockatrice/card/lazy_properties_hash.h
+++ b/libcockatrice_card/libcockatrice/card/lazy_properties_hash.h
@@ -60,8 +60,9 @@ public:
      * @brief Inserts a value into the materialized properties hash
      * @param key The key
      * @param value The value to insert
+     * @return True if a new value was inserted; false if the new value is the same as the existing value
      */
-    void insert(const QString &key, const QString &value);
+    bool insert(const QString &key, const QString &value);
 
     /**
      * @brief Gets a view of the materialized properties hash.