diff --git a/src/Reflection/InitializerExprContext.php b/src/Reflection/InitializerExprContext.php
index 65568cd890..1818d15e92 100644
--- a/src/Reflection/InitializerExprContext.php
+++ b/src/Reflection/InitializerExprContext.php
@@ -47,7 +47,7 @@ private static function parseNamespace(string $name): ?string
 	{
 		$parts = explode('\\', $name);
 		if (count($parts) > 1) {
-			return implode('\\', array_slice($parts, 0, 1));
+			return implode('\\', array_slice($parts, 0, -1));
 		}
 
 		return null;
diff --git a/tests/PHPStan/Rules/PhpDoc/IncompatibleClassConstantPhpDocTypeRuleTest.php b/tests/PHPStan/Rules/PhpDoc/IncompatibleClassConstantPhpDocTypeRuleTest.php
index 5e1bbacf75..e033737170 100644
--- a/tests/PHPStan/Rules/PhpDoc/IncompatibleClassConstantPhpDocTypeRuleTest.php
+++ b/tests/PHPStan/Rules/PhpDoc/IncompatibleClassConstantPhpDocTypeRuleTest.php
@@ -49,4 +49,9 @@ public function testBug7352(): void
 		$this->analyse([__DIR__ . '/data/bug-7352.php'], []);
 	}
 
+	public function testBug7352WithSubNamespace(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-7352-with-sub-namespace.php'], []);
+	}
+
 }
diff --git a/tests/PHPStan/Rules/PhpDoc/data/bug-7352-with-sub-namespace.php b/tests/PHPStan/Rules/PhpDoc/data/bug-7352-with-sub-namespace.php
new file mode 100644
index 0000000000..a9b87c2cf7
--- /dev/null
+++ b/tests/PHPStan/Rules/PhpDoc/data/bug-7352-with-sub-namespace.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Bug7352\WithSubNamespace;
+
+const MY_OTHER_CONST = 'thing';
+
+class World
+{
+	/** @var string */
+	const THERE = MY_OTHER_CONST;
+}