diff --git a/src/babashka/impl/classes.clj b/src/babashka/impl/classes.clj
index 1b338c94..f354ba5c 100644
--- a/src/babashka/impl/classes.clj
+++ b/src/babashka/impl/classes.clj
@@ -197,6 +197,7 @@
           java.util.Base64$Decoder
           java.util.Base64$Encoder
           java.util.Date
+          java.util.Map
           java.util.MissingResourceException
           java.util.Properties
           java.util.Set
@@ -235,19 +236,24 @@
                    c))]
     (assoc m :public-class
            (fn [v]
-             (cond (instance? java.nio.file.Path v)
-                   java.nio.file.Path
-                   (instance? java.lang.Process v)
+             (cond (instance? java.lang.Process v)
                    java.lang.Process
+                   ;; added for calling .put on .environment from ProcessBuilder
+                   (instance? java.util.Map v)
+                   java.util.Map
                    ;; added for issue #239 regarding clj-http-lite
                    (instance? java.io.ByteArrayOutputStream v)
                    java.io.ByteArrayOutputStream
                    (instance? java.security.MessageDigest v)
                    java.security.MessageDigest
+                   ;; streams
                    (instance? java.io.InputStream v)
                    java.io.InputStream
                    (instance? java.io.OutputStream v)
                    java.io.OutputStream
+                   ;; java nio
+                   (instance? java.nio.file.Path v)
+                   java.nio.file.Path
                    (instance? java.nio.file.FileSystem v)
                    java.nio.file.FileSystem
                    (instance? java.nio.file.PathMatcher v)
diff --git a/test/babashka/main_test.clj b/test/babashka/main_test.clj
index deb9aecf..56fc7693 100644
--- a/test/babashka/main_test.clj
+++ b/test/babashka/main_test.clj
@@ -223,7 +223,10 @@
 
 (deftest process-builder-test
   (is (str/includes? (bb nil "
-(def ls (-> (ProcessBuilder. [\"ls\"]) (.start)))
+(def pb (ProcessBuilder. [\"ls\"]))
+(def env (.environment pb))
+(.put env \"FOO\" \"BAR\") ;; test for issue 460
+(def ls (-> pb (.start)))
 (def input (.getOutputStream ls))
 (.write (io/writer input) \"hello\") ;; dummy test just to see if this works
 (def output (.getInputStream ls))