diff --git a/libpng.3 b/libpng.3
index 67c38cfb..dd0ca1cb 100644
--- a/libpng.3
+++ b/libpng.3
@@ -4163,6 +4163,7 @@ the first widely used release:
  1.2.39rc01          13    10239  12.so.0.39[.0]
  1.0.48              10    10048  10.so.0.48[.0]
  1.2.39              13    10239  12.so.0.39[.0]
+ 1.2.40beta01        13    10240  12.so.0.40[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be
diff --git a/png.h b/png.h
index 656eba16..76f9fe09 100644
--- a/png.h
+++ b/png.h
@@ -241,6 +241,7 @@
  *    1.2.39rc01              13    10239  12.so.0.39[.0]
  *    1.0.48                  10    10048  10.so.0.48[.0]
  *    1.2.39                  13    10239  12.so.0.39[.0]
+ *    1.2.40beta01            13    10240  12.so.0.40[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be