diff --git a/README.md b/README.md
index bbf2a85..1b54c4d 100644
--- a/README.md
+++ b/README.md
@@ -161,8 +161,6 @@ Another approach for DIC-only usages is to scan the generated php file, but that
 
 ## Limitations:
 - Extension dependencies are not analysed (e.g. `ext-json`)
-- Files without namespace has limited support
-  - Only symbols with use statements and FQNs are detected
 
 ## Contributing:
 - Check your code by `composer check`
diff --git a/src/UsedSymbolExtractor.php b/src/UsedSymbolExtractor.php
index 10537d1..8f386c8 100644
--- a/src/UsedSymbolExtractor.php
+++ b/src/UsedSymbolExtractor.php
@@ -7,6 +7,7 @@
 use function is_array;
 use function ltrim;
 use function strlen;
+use function strpos;
 use function substr;
 use function token_get_all;
 use const PHP_VERSION_ID;
@@ -72,6 +73,7 @@ public function parseUsedSymbols(): array
 
         $level = 0; // {, }, {$, ${
         $squareLevel = 0; // [, ], #[
+        $inGlobalScope = true;
         $inClassLevel = null;
         $inAttributeSquareLevel = null;
 
@@ -105,6 +107,7 @@ public function parseUsedSymbols(): array
                         break;
 
                     case PHP_VERSION_ID >= 80000 ? T_NAMESPACE : -1:
+                        $inGlobalScope = false;
                         $useStatements = []; // reset use statements on namespace change
                         break;
 
@@ -121,6 +124,11 @@ public function parseUsedSymbols(): array
                             $symbolName = $useStatements[$neededAlias] . substr($token[1], strlen($neededAlias));
                             $kind = $this->getFqnSymbolKind($this->pointer - 2, $this->pointer, $inAttributeSquareLevel !== null);
                             $usedSymbols[$kind][$symbolName][] = $token[2];
+
+                        } elseif ($inGlobalScope) {
+                            $symbolName = $token[1];
+                            $kind = $this->getFqnSymbolKind($this->pointer - 2, $this->pointer, $inAttributeSquareLevel !== null);
+                            $usedSymbols[$kind][$symbolName][] = $token[2];
                         }
 
                         break;
@@ -142,6 +150,7 @@ public function parseUsedSymbols(): array
 
                         if (substr($nextName, 0, 1) !== '\\') { // not a namespace-relative name, but a new namespace declaration
                             $useStatements = []; // reset use statements on namespace change
+                            $inGlobalScope = false;
                         }
 
                         break;
@@ -173,6 +182,11 @@ public function parseUsedSymbols(): array
                                 $symbolName = $useStatements[$neededAlias] . substr($name, strlen($neededAlias));
                                 $kind = $this->getFqnSymbolKind($pointerBeforeName, $this->pointer - 1, false);
                                 $usedSymbols[$kind][$symbolName][] = $token[2];
+
+                            } elseif ($inGlobalScope && strpos($name, '\\') !== false) {
+                                $symbolName = $name;
+                                $kind = $this->getFqnSymbolKind($pointerBeforeName, $this->pointer - 1, false);
+                                $usedSymbols[$kind][$symbolName][] = $token[2];
                             }
                         }
 
diff --git a/tests/UsedSymbolExtractorTest.php b/tests/UsedSymbolExtractorTest.php
index 5f85160..5a039cc 100644
--- a/tests/UsedSymbolExtractorTest.php
+++ b/tests/UsedSymbolExtractorTest.php
@@ -105,6 +105,10 @@ public function provideVariants(): iterable
             [
                 SymbolKind::CLASSLIKE => [
                     'DateTimeImmutable' => [3],
+                    'PHPUnit\Framework\Error' => [5],
+                ],
+                SymbolKind::FUNCTION => [
+                    'PHPUnit\Framework\assertSame' => [7],
                 ],
             ],
         ];
diff --git a/tests/data/not-autoloaded/used-symbols/global-namespace.php b/tests/data/not-autoloaded/used-symbols/global-namespace.php
index fb70774..a6e0929 100644
--- a/tests/data/not-autoloaded/used-symbols/global-namespace.php
+++ b/tests/data/not-autoloaded/used-symbols/global-namespace.php
@@ -2,7 +2,9 @@
 
 new \DateTimeImmutable();
 new DateTime;
+new PHPUnit\Framework\Error();
 
+PHPUnit\Framework\assertSame(1, 1);
 
 class Foo {
     public function someFunction(string $foo): void
diff --git a/tests/data/not-autoloaded/used-symbols/relative-namespace.php b/tests/data/not-autoloaded/used-symbols/relative-namespace.php
index 9e3c447..ec6805c 100644
--- a/tests/data/not-autoloaded/used-symbols/relative-namespace.php
+++ b/tests/data/not-autoloaded/used-symbols/relative-namespace.php
@@ -8,3 +8,4 @@
 class Foo {}
 new namespace\Foo();
 new DateTimeImmutable();
+new Foo\Bar; // is Relative\Foo\Bar