diff --git a/src/main/org/apache/tools/ant/taskdefs/optional/ReplaceRegExp.java b/src/main/org/apache/tools/ant/taskdefs/optional/ReplaceRegExp.java
index 18247e75a..cc630cb50 100644
--- a/src/main/org/apache/tools/ant/taskdefs/optional/ReplaceRegExp.java
+++ b/src/main/org/apache/tools/ant/taskdefs/optional/ReplaceRegExp.java
@@ -448,7 +448,6 @@ public class ReplaceRegExp extends Task {
                     }
                 } while (c >= 0);
 
-                bw.flush();
             } else {
                 String buf = FileUtils.safeReadFully(br);
 
@@ -459,9 +458,10 @@ public class ReplaceRegExp extends Task {
                 }
 
                 bw.write(res);
-                bw.flush();
             }
 
+            bw.flush();
+
             r.close();
             r = null;
             w.close();