diff --git a/cockatrice/src/client/ui/pixel_map_generator.cpp b/cockatrice/src/client/ui/pixel_map_generator.cpp
index c695e1093..25bd67264 100644
--- a/cockatrice/src/client/ui/pixel_map_generator.cpp
+++ b/cockatrice/src/client/ui/pixel_map_generator.cpp
@@ -180,6 +180,12 @@ QMap<QString, QPixmap> CountryPixmapGenerator::pmCache;
  * @param idName id that the tag has to match
  * @param attrValue the value to update the attribute to
  */
+static void setAttrRecur(QDomElement &elem,
+                         const QString &tagName,
+                         const QString &attrName,
+                         const QString &idName,
+                         const QString &attrValue);
+
 void setAttrRecur(QDomElement &elem,
                   const QString &tagName,
                   const QString &attrName,