diff --git a/ChangeLog b/ChangeLog
index c63b952a1c..7f41716fa8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Aug 23 10:37:24 EDT 1999  Austin Donnelly  <austin@gimp.org>
+
+	* gimprc.5.in: add docs for %Dx image-title-format string.
+
 Mon Aug 23 10:15:32 EDT 1999  Austin Donnelly  <austin@gimp.org>
 
 	Dirty flag now correct in all cases.  Can be displayed in image
diff --git a/gimprc-1.2.5.in b/gimprc-1.2.5.in
index 0efb0f9daf..28b4819d5b 100644
--- a/gimprc-1.2.5.in
+++ b/gimprc-1.2.5.in
@@ -399,6 +399,9 @@ sequences are recognised and expanded as follows:
 %s  source scale factor
 .br
 %d  destination scale factor
+.br
+%Dx expands to x if the image is dirty, the empty string
+otherwise.  The x can be any character, eg %D*.
 
 The default format string is "%f-%p.%i (%t)".
 
diff --git a/gimprc.5.in b/gimprc.5.in
index 0efb0f9daf..28b4819d5b 100644
--- a/gimprc.5.in
+++ b/gimprc.5.in
@@ -399,6 +399,9 @@ sequences are recognised and expanded as follows:
 %s  source scale factor
 .br
 %d  destination scale factor
+.br
+%Dx expands to x if the image is dirty, the empty string
+otherwise.  The x can be any character, eg %D*.
 
 The default format string is "%f-%p.%i (%t)".