diff --git a/src/Psalm/Internal/Analyzer/Statements/Expression/Assignment/InstancePropertyAssignmentAnalyzer.php b/src/Psalm/Internal/Analyzer/Statements/Expression/Assignment/InstancePropertyAssignmentAnalyzer.php
index 485a1f1b2..8cb2ef2ef 100644
--- a/src/Psalm/Internal/Analyzer/Statements/Expression/Assignment/InstancePropertyAssignmentAnalyzer.php
+++ b/src/Psalm/Internal/Analyzer/Statements/Expression/Assignment/InstancePropertyAssignmentAnalyzer.php
@@ -759,6 +759,8 @@ class InstancePropertyAssignmentAnalyzer
             return [];
         }
 
+        $context_type = $context_type ?: $assignment_value_type;
+
         if ($var_id && $context_type) {
             if ($context->collect_initializations
                 && $lhs_var_id === '$this'