diff --git a/index.js b/index.js
index fff3a24..7ee9e6f 100644
--- a/index.js
+++ b/index.js
@@ -24,7 +24,7 @@ function getAbsolutePath(relativePath, context, rootDir, prefix) {
       path.join(path.dirname(context.getFilename()), relativePath)
     )
     .split(path.sep)
-  ].join("/");
+  ].filter(String).join("/");
 }
 
 const message = "import statements should have an absolute path";