diff --git a/infra/libfuzzer-pipeline.groovy b/infra/libfuzzer-pipeline.groovy
index 17ac5fabb..683740c20 100644
--- a/infra/libfuzzer-pipeline.groovy
+++ b/infra/libfuzzer-pipeline.groovy
@@ -62,7 +62,7 @@ def call(body) {
           if (dockerContextDir == null) {
             dockerContextDir = new File(dockerfile)
                 .getAbsoluteFile()
-                .getParent()
+                .getParentFile()
                 .getAbsolutePath();
           }