diff --git a/Library/Statements/Let/ObjectPropertyAppend.php b/Library/Statements/Let/ObjectPropertyAppend.php
index a8f75fe386..67b69793cf 100644
--- a/Library/Statements/Let/ObjectPropertyAppend.php
+++ b/Library/Statements/Let/ObjectPropertyAppend.php
@@ -128,6 +128,7 @@ public function assign($variable, ZephirVariable $symbolVariable, CompiledExpres
 
             case 'string':
                 $tempVariable = $compilationContext->symbolTable->getTempNonTrackedVariable('variable', $compilationContext, true);
+                $tempVariable->initVariant($compilationContext);
                 $compilationContext->backend->assignString($tempVariable, $resolvedExpr->getCode(), $compilationContext);
                 $compilationContext->backend->assignArrayProperty($symbolVariable, $property, null, $tempVariable, $compilationContext);
                 if ($tempVariable->isTemporal()) {