diff --git a/src/Analyser/MutatingScope.php b/src/Analyser/MutatingScope.php
index 832c73b1c0..f883c95578 100644
--- a/src/Analyser/MutatingScope.php
+++ b/src/Analyser/MutatingScope.php
@@ -610,12 +610,7 @@ public function hasConstant(Name $name): bool
 			return $this->fileHasCompilerHaltStatementCalls();
 		}
 
-		if (!$name->isFullyQualified() && $this->getNamespace() !== null) {
-			if ($this->hasExpressionType(new ConstFetch(new FullyQualified([$this->getNamespace(), $name->toString()])))->yes()) {
-				return true;
-			}
-		}
-		if ($this->hasExpressionType(new ConstFetch(new FullyQualified($name->toString())))->yes()) {
+		if ($this->getGlobalConstantType($name) !== null) {
 			return true;
 		}
 
@@ -5686,6 +5681,25 @@ private function getConstantTypes(): array
 		return $constantTypes;
 	}
 
+	private function getGlobalConstantType(Name $name): ?Type
+	{
+		$fetches = [];
+		if (!$name->isFullyQualified() && $this->getNamespace() !== null) {
+			$fetches[] = new ConstFetch(new FullyQualified([$this->getNamespace(), $name->toString()]));
+		}
+
+		$fetches[] = new ConstFetch(new FullyQualified($name->toString()));
+		$fetches[] = new ConstFetch($name);
+
+		foreach ($fetches as $constFetch) {
+			if ($this->hasExpressionType($constFetch)->yes()) {
+				return $this->getType($constFetch);
+			}
+		}
+
+		return null;
+	}
+
 	/**
 	 * @return array<string, ExpressionTypeHolder>
 	 */
@@ -5728,15 +5742,15 @@ public function getIterableValueType(Type $iteratee): Type
 
 	public function getPhpVersion(): PhpVersions
 	{
-		$versionExpr = new ConstFetch(new Name('PHP_VERSION_ID'));
-		if (!$this->hasExpressionType($versionExpr)->yes()) {
-			if (is_array($this->configPhpVersion)) {
-				return new PhpVersions(IntegerRangeType::fromInterval($this->configPhpVersion['min'], $this->configPhpVersion['max']));
-			}
-			return new PhpVersions(new ConstantIntegerType($this->phpVersion->getVersionId()));
+		$constType = $this->getGlobalConstantType(new Name('PHP_VERSION_ID'));
+		if ($constType !== null) {
+			return new PhpVersions($constType);
 		}
 
-		return new PhpVersions($this->getType($versionExpr));
+		if (is_array($this->configPhpVersion)) {
+			return new PhpVersions(IntegerRangeType::fromInterval($this->configPhpVersion['min'], $this->configPhpVersion['max']));
+		}
+		return new PhpVersions(new ConstantIntegerType($this->phpVersion->getVersionId()));
 	}
 
 }
diff --git a/src/Php/PhpVersions.php b/src/Php/PhpVersions.php
index 74474b28b0..229dccb72d 100644
--- a/src/Php/PhpVersions.php
+++ b/src/Php/PhpVersions.php
@@ -18,6 +18,11 @@ public function __construct(
 	{
 	}
 
+	public function getType(): Type
+	{
+		return $this->phpVersions;
+	}
+
 	public function supportsNoncapturingCatches(): TrinaryLogic
 	{
 		return IntegerRangeType::fromInterval(80000, null)->isSuperTypeOf($this->phpVersions)->result;
diff --git a/tests/PHPStan/Analyser/ScopePhpVersionTest.php b/tests/PHPStan/Analyser/ScopePhpVersionTest.php
new file mode 100644
index 0000000000..fac3b8a066
--- /dev/null
+++ b/tests/PHPStan/Analyser/ScopePhpVersionTest.php
@@ -0,0 +1,43 @@
+<?php declare(strict_types = 1);
+
+namespace PHPStan\Analyser;
+
+use PhpParser\Node;
+use PhpParser\Node\Expr\Exit_;
+use PHPStan\Testing\TypeInferenceTestCase;
+use PHPStan\Type\VerbosityLevel;
+
+class ScopePhpVersionTest extends TypeInferenceTestCase
+{
+
+	public function dataTestPhpVersion(): array
+	{
+		return [
+			[
+				'int<80000, 80499>',
+				__DIR__ . '/data/scope-constants-global.php',
+			],
+			[
+				'int<80000, 80499>',
+				__DIR__ . '/data/scope-constants-namespace.php',
+			],
+		];
+	}
+
+	/**
+	 * @dataProvider dataTestPhpVersion
+	 */
+	public function testPhpVersion(string $expected, string $file): void
+	{
+		self::processFile($file, function (Node $node, Scope $scope) use ($expected): void {
+			if (!($node instanceof Exit_)) {
+				return;
+			}
+			$this->assertSame(
+				$expected,
+				$scope->getPhpVersion()->getType()->describe(VerbosityLevel::precise()),
+			);
+		});
+	}
+
+}
diff --git a/tests/PHPStan/Analyser/data/scope-constants-global.php b/tests/PHPStan/Analyser/data/scope-constants-global.php
new file mode 100644
index 0000000000..56eba41c9a
--- /dev/null
+++ b/tests/PHPStan/Analyser/data/scope-constants-global.php
@@ -0,0 +1,9 @@
+<?php
+
+// global namespace required for the test to work
+
+if (PHP_VERSION_ID < 80000) {
+	return;
+}
+
+exit();
diff --git a/tests/PHPStan/Analyser/data/scope-constants-namespace.php b/tests/PHPStan/Analyser/data/scope-constants-namespace.php
new file mode 100644
index 0000000000..185fc3ee0b
--- /dev/null
+++ b/tests/PHPStan/Analyser/data/scope-constants-namespace.php
@@ -0,0 +1,9 @@
+<?php
+
+namespace NamespacedConstants;
+
+if (PHP_VERSION_ID < 80000) {
+	return;
+}
+
+exit();