diff --git a/libpng.3 b/libpng.3
index bd99dcf..b1eee8b 100644
--- a/libpng.3
+++ b/libpng.3
@@ -4288,7 +4288,7 @@
  1.0.49              10    10049  10.so.0.49[.0]
  1.2.40              13    10240  12.so.0.40[.0]
  1.0.50              10    10050  10.so.0.50[.0]
- 1.2.41beta01-18     13    10241  12.so.0.41[.0]
+ 1.2.41beta01-17     13    10241  12.so.0.41[.0]
 
 Henceforth the source version will match the shared-library minor
 and patch numbers; the shared-library major version number will be