diff --git a/src/index.ts b/src/index.ts
index f0960108..f9200815 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -301,7 +301,7 @@ const typescript: PluginImpl<RPT2Options> = (options) =>
 			parsedConfig.fileNames.forEach((name) =>
 			{
 				const key = normalize(name);
-				if (key in declarations)
+				if (key in declarations || !filter(key))
 					return;
 				if (!allImportedFiles.has(key))
 				{