diff --git a/src/Psalm/Internal/Codebase/Taint.php b/src/Psalm/Internal/Codebase/Taint.php
index 9d4259b6f..429e95806 100644
--- a/src/Psalm/Internal/Codebase/Taint.php
+++ b/src/Psalm/Internal/Codebase/Taint.php
@@ -344,7 +344,7 @@ class Taint
             $generated_sources[] = $generated_source;
         } elseif (isset($this->specializations[$source->id])) {
             foreach ($this->specializations[$source->id] as $specialization => $_) {
-                if (isset($source->specialized_calls[$specialization])) {
+                if (!$source->specialized_calls || isset($source->specialized_calls[$specialization])) {
                     $new_source = clone $source;
 
                     $new_source->id = $source->id . '-' . $specialization;
diff --git a/tests/TaintTest.php b/tests/TaintTest.php
index b1b4f49f9..7dc5b05fd 100644
--- a/tests/TaintTest.php
+++ b/tests/TaintTest.php
@@ -1411,6 +1411,18 @@ class TaintTest extends TestCase
                     }',
                 'error_message' => 'TaintedInput',
             ],
+            'taintSpecializedMethod' => [
+                '<?php
+                    /** @psalm-taint-specialize */
+                    class Unsafe {
+                        public function isUnsafe() {
+                            return $_GET["unsafe"];
+                        }
+                    }
+                    $a = new Unsafe();
+                    echo $a->isUnsafe();',
+                'error_message' => 'TaintedInput',
+            ],
         ];
     }
 }