diff --git a/src/CheckerFileProcessor.php b/src/CheckerFileProcessor.php
index 1426d0b..d576b23 100644
--- a/src/CheckerFileProcessor.php
+++ b/src/CheckerFileProcessor.php
@@ -152,6 +152,10 @@ public function processFile(string $file): array
                             continue;
                         }
 
+                        if ($method['return'] === 'void') {
+                            continue;
+                        }
+
                         $warnings[] = [
                             'type'   => 'return-missing',
                             'file'   => $file,
diff --git a/src/FileProcessor.php b/src/FileProcessor.php
index c948e16..862e84b 100644
--- a/src/FileProcessor.php
+++ b/src/FileProcessor.php
@@ -260,11 +260,13 @@ protected function processDocblock(string $text, array $uses = []): array
             }
 
             $types = [];
-            foreach (\explode('|', $type) as $tmpType) {
-                if (isset($uses[$tmpType])) {
-                    $tmpType = $uses[$tmpType];
+            if ($type) {
+                foreach (\explode('|', $type) as $tmpType) {
+                    if (isset($uses[$tmpType])) {
+                        $tmpType = $uses[$tmpType];
+                    }
+                    $types[] = \substr($tmpType, 0, 1) === '\\' ? \substr($tmpType, 1) : $tmpType;
                 }
-                $types[] = \substr($tmpType, 0, 1) === '\\' ? \substr($tmpType, 1) : $tmpType;
             }
             $result['return'] = \implode('|', $types);
         }
diff --git a/tests/data/TestClass.php b/tests/data/TestClass.php
index baa240c..62b44bb 100644
--- a/tests/data/TestClass.php
+++ b/tests/data/TestClass.php
@@ -54,6 +54,33 @@ public function test121(int $param1): bool
     {
     }
 
+    /**
+     * @param int $param1
+     *
+     * @return
+     */
+    public function test122(int $param1)
+    {
+    }
+
+    /**
+     * @param int $param1
+     *
+     * @return
+     */
+    public function test123(int $param1): void
+    {
+    }
+
+    /**
+     * @param int $param1
+     *
+     * @return
+     */
+    public function test124(int $param1): bool
+    {
+    }
+
     /**
      * @param int|null $param1
      *
diff --git a/tests/src/CheckerFileProcessorTest.php b/tests/src/CheckerFileProcessorTest.php
index c172fdf..6e02f5a 100644
--- a/tests/src/CheckerFileProcessorTest.php
+++ b/tests/src/CheckerFileProcessorTest.php
@@ -113,12 +113,18 @@ public function testProcessFile()
                     'param'      => '$param1',
                     'param-type' => 'int',
                     'doc-type'   => 'int|null',
+                ],                 [
+                    'type'   => 'return-missing',
+                    'file'   => 'TestClass.php',
+                    'class'  => 'Test\Example\TestClass',
+                    'method' => 'test124',
+                    'line'   => 80,
                 ], [
                     'type'       => 'param-mismatch',
                     'file'       => 'TestClass.php',
                     'class'      => 'Test\Example\TestClass',
                     'method'     => 'test132',
-                    'line'       => 80,
+                    'line'       => 107,
                     'param'      => '$param1',
                     'param-type' => 'int|null',
                     'doc-type'   => 'int',
@@ -127,7 +133,7 @@ public function testProcessFile()
                     'file'        => 'TestClass.php',
                     'class'       => 'Test\Example\TestClass',
                     'method'      => 'test132',
-                    'line'        => 80,
+                    'line'        => 107,
                     'return-type' => 'bool|null',
                     'doc-type'    => 'bool',
                 ], [
@@ -135,7 +141,7 @@ public function testProcessFile()
                     'file'        => 'TestClass.php',
                     'class'       => 'Test\Example\TestClass',
                     'method'      => 'test141',
-                    'line'        => 107,
+                    'line'        => 134,
                     'param'      => '$param1',
                     'param-type' => 'int|float',
                     'doc-type'   => 'int',
@@ -144,7 +150,7 @@ public function testProcessFile()
                     'file'        => 'TestClass.php',
                     'class'       => 'Test\Example\TestClass',
                     'method'      => 'test141',
-                    'line'        => 107,
+                    'line'        => 134,
                     'return-type' => 'bool|int',
                     'doc-type'    => 'bool',
                 ]