diff --git a/scalac-scoverage-plugin/src/main/scala/scoverage/report/ScoverageHtmlWriter.scala b/scalac-scoverage-plugin/src/main/scala/scoverage/report/ScoverageHtmlWriter.scala
index 7ac44a23..08125e70 100644
--- a/scalac-scoverage-plugin/src/main/scala/scoverage/report/ScoverageHtmlWriter.scala
+++ b/scalac-scoverage-plugin/src/main/scala/scoverage/report/ScoverageHtmlWriter.scala
@@ -23,7 +23,7 @@ class ScoverageHtmlWriter(sourceDirectory: File, outputDir: File) {
     coverage.packages.foreach(writePackage)
   }
 
-  private def relativeSource(src: String): String = src.replace(sourceDirectory.getAbsolutePath + File.separator, "")
+  private def relativeSource(src: String): String = src.replace(sourceDirectory.getCanonicalPath + File.separator, "")
 
   private def writePackage(pkg: MeasuredPackage): Unit = {
     // package overview files are written out using a filename that respects the package name