diff --git a/src/core/expression/qgsexpressionfunction.cpp b/src/core/expression/qgsexpressionfunction.cpp
index c7ea9c262a6..b9c6f309893 100644
--- a/src/core/expression/qgsexpressionfunction.cpp
+++ b/src/core/expression/qgsexpressionfunction.cpp
@@ -5065,6 +5065,10 @@ static QVariant fcnGenericHash( const QVariantList &values, const QgsExpressionC
     hash = fcnHash( str, QCryptographicHash::Keccak_512 );
   }
 #endif
+  else
+  {
+    parent->setEvalErrorString( QObject::tr( "Hash method %1 is not available on this system." ).arg( str ) );
+  }
   return hash;
 }
 
diff --git a/tests/src/core/testqgsexpression.cpp b/tests/src/core/testqgsexpression.cpp
index 8e13021094d..c1704e46bdd 100644
--- a/tests/src/core/testqgsexpression.cpp
+++ b/tests/src/core/testqgsexpression.cpp
@@ -1476,7 +1476,7 @@ class TestQgsExpression: public QObject
       QTest::newRow( "md5('QGIS')" ) << QStringLiteral( "md5('QGIS')" ) << false << QVariant( "57470aaa9e22adaefac7f5f342f1c6da" );
       QTest::newRow( "sha256(NULL)" ) << QStringLiteral( "sha256(NULL)" ) << false << QVariant( );
       QTest::newRow( "sha256('QGIS')" ) << QStringLiteral( "sha256('QGIS')" ) << false << QVariant( "eb045cba7a797aaa06ac58830846e40c8e8c780bc0676d3393605fae50c05309" );
-      QTest::newRow( "hash('QGIS', 'qsdf')" ) << QStringLiteral( "hash('QGIS', 'qsdf')" ) << false << QVariant();
+      QTest::newRow( "hash('QGIS', 'qsdf')" ) << QStringLiteral( "hash('QGIS', 'qsdf')" ) << true << QVariant();
       QTest::newRow( "hash('QGIS', 'md4')" ) << QStringLiteral( "hash('QGIS', 'md4')" ) << false << QVariant( "c0fc71c241cdebb6e888cbac0e2b68eb" );
       QTest::newRow( "hash('QGIS', 'md5')" ) << QStringLiteral( "hash('QGIS', 'md5')" ) << false << QVariant( "57470aaa9e22adaefac7f5f342f1c6da" );
       QTest::newRow( "hash('QGIS', 'sha1')" ) << QStringLiteral( "hash('QGIS', 'sha1')" ) << false << QVariant( "f87cfb2b74cdd5867db913237024e7001e62b114" );