diff --git a/profiles/package.deprecated b/profiles/package.deprecated
index f6f355d97f8f4..378370bfbcd9d 100644
--- a/profiles/package.deprecated
+++ b/profiles/package.deprecated
@@ -17,6 +17,15 @@
 
 #--- END OF EXAMPLES ---
 
+# Michał Górny <mgorny@gentoo.org> (2025-11-04)
+# Please depend on virtual/zlib, unless you are sure that the package
+# in question is not compatible with sys-libs/zlib-ng[compat] and/or
+# sys-libs/minizip-ng[compat].  In the latter case, please report a bug,
+# so that upstream can improve the API/ABI compatibility.
+# This is a temporary deprecation to aid transitioning packages imported
+# from other repositories.
+sys-libs/zlib
+
 # Michał Górny <mgorny@gentoo.org> (2025-10-26)
 # No activity since 2022.  Already requires extensive patching,
 # broken with Python 3.14.