diff --git a/WHATSNEW b/WHATSNEW
index e300a3d2d..0e62d0a88 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -219,6 +219,9 @@ Fixed bugs:
 * ftp chmod failed when the remote system was UNIX and local system Windows
   Bugzilla Report 21865.
 
+* ftp put with chmod failed when the remote system was UNIX and local system Windows
+  Bugzilla Report 23143.
+
 * ftp did not set the ascii mode explicity, causing problems with ftp servers
   having binary as default
 
diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/net/FTP.java b/src/main/org/apache/tools/ant/taskdefs/optional/net/FTP.java
index b0c8636f6..a78fecf72 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/net/FTP.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/net/FTP.java
@@ -1706,7 +1706,7 @@ public class FTP
             } else {
                 // see if we should issue a chmod command
                 if (chmod != null) {
-                    doSiteCommand(ftp, "chmod " + chmod + " " + filename);
+                    doSiteCommand(ftp, "chmod " + chmod + " " + resolveFile(filename));
                 }
                 log("File " + file.getAbsolutePath() + " copied to " + server,
                     Project.MSG_VERBOSE);