diff --git a/src/babashka/impl/classes.clj b/src/babashka/impl/classes.clj
index 4a4e404a..8d2cbb66 100644
--- a/src/babashka/impl/classes.clj
+++ b/src/babashka/impl/classes.clj
@@ -21,6 +21,7 @@
           java.io.InputStream
           java.io.IOException
           java.io.OutputStream
+          java.io.FileReader
           java.io.Reader
           java.io.StringReader
           java.io.StringWriter
diff --git a/test/babashka/main_test.clj b/test/babashka/main_test.clj
index eb52dcf0..28df8581 100644
--- a/test/babashka/main_test.clj
+++ b/test/babashka/main_test.clj
@@ -369,6 +369,12 @@
 (deftest available-stream-test
   (is (= 0 (bb nil "(.available System/in)"))))
 
+(deftest file-reader-test
+  (when (str/includes? (str/lower-case (System/getProperty "os.name")) "linux")
+    (let [v (bb nil "(slurp (io/reader (java.io.FileReader. \"/proc/loadavg\")))")]
+      (prn "output:" v)
+      (is v))))
+
 ;;;; Scratch
 
 (comment