diff --git a/src/Type/Php/JsonThrowOnErrorDynamicReturnTypeExtension.php b/src/Type/Php/JsonThrowOnErrorDynamicReturnTypeExtension.php
index cf653e182e..be7c236364 100644
--- a/src/Type/Php/JsonThrowOnErrorDynamicReturnTypeExtension.php
+++ b/src/Type/Php/JsonThrowOnErrorDynamicReturnTypeExtension.php
@@ -45,7 +45,7 @@ public function isFunctionSupported(
 			return true;
 		}
 
-		return $this->reflectionProvider->hasConstant(new FullyQualified('JSON_THROW_ON_ERROR'), null) && $functionReflection->getName() === 'json_encode';
+		return $functionReflection->getName() === 'json_encode' && $this->reflectionProvider->hasConstant(new FullyQualified('JSON_THROW_ON_ERROR'), null);
 	}
 
 	public function getTypeFromFunctionCall(
diff --git a/src/Type/Php/JsonThrowTypeExtension.php b/src/Type/Php/JsonThrowTypeExtension.php
index e58f80d814..29eaf4f290 100644
--- a/src/Type/Php/JsonThrowTypeExtension.php
+++ b/src/Type/Php/JsonThrowTypeExtension.php
@@ -32,14 +32,14 @@ public function isFunctionSupported(
 		FunctionReflection $functionReflection,
 	): bool
 	{
-		return $this->reflectionProvider->hasConstant(new Name\FullyQualified('JSON_THROW_ON_ERROR'), null) && in_array(
+		return in_array(
 			$functionReflection->getName(),
 			[
 				'json_encode',
 				'json_decode',
 			],
 			true,
-		);
+		) && $this->reflectionProvider->hasConstant(new Name\FullyQualified('JSON_THROW_ON_ERROR'), null);
 	}
 
 	public function getThrowTypeFromFunctionCall(