diff --git a/doc/upx.pod b/doc/upx.pod
index 12b47b81..685aa235 100644
--- a/doc/upx.pod
+++ b/doc/upx.pod
@@ -188,6 +188,10 @@ Try if B<--overlay=strip> works.
 
 =item *
 
+Try B<--all-filters>.
+
+=item *
+
 For win32/pe programs there's B<--strip-relocs=0>. See notes below.
 
 =back
@@ -334,6 +338,11 @@ Extra options available for this executable format:
   --coff              Produce COFF output instead of EXE. By default
                       UPX keeps your current stub.
 
+  --all-filters       Compress the program several times, using different
+                      preprocessing filters. This may improve the compression
+                      ratio in some cases, but usually the default filter
+                      gives the best results anyway.
+
 
 
 =head2 NOTES FOR LINUX [general]
@@ -679,7 +688,10 @@ Drawbacks:
 
 Extra options available for this executable format:
 
-  (none)
+  --all-filters       Compress the program several times, using different
+                      preprocessing filters. This may improve the compression
+                      ratio in some cases, but usually the default filter
+                      gives the best results anyway.
 
 
 
@@ -755,6 +767,11 @@ Extra options available for this executable format:
                       UPX never strips relocations from a DLL
                       regardless of this option.
 
+  --all-filters       Compress the program several times, using different
+                      preprocessing filters. This may improve the compression
+                      ratio in some cases, but usually the default filter
+                      gives the best results anyway.
+
 
 
 =head1 DIAGNOSTICS