diff --git a/src/libtomahawk/resolvers/JSResolverHelper.cpp b/src/libtomahawk/resolvers/JSResolverHelper.cpp
index 000722592..75e533e09 100644
--- a/src/libtomahawk/resolvers/JSResolverHelper.cpp
+++ b/src/libtomahawk/resolvers/JSResolverHelper.cpp
@@ -810,7 +810,7 @@ JSResolverHelper::addToFuzzyIndex( const QVariantList& list )
 
 
 bool
-cmpTuple ( QVariant& x, QVariant& y )
+cmpTuple ( const QVariant& x, const QVariant& y )
 {
     return x.toList().at( 1 ).toFloat() < y.toList().at( 1 ).toFloat();
 }