diff --git a/README.md b/README.md
index 5eb9e78d..d80740c0 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ System requirements:
 - at least Java Runtime Environment (JRE) 11
 - native libraries: libzkgroup, libsignal-client
 
-  Those are bundled for x86_64 Linux, for other systems/architectures see: [Provide native lib for libsignal](https://github.com/AsamK/signal-cli/wiki/Provide-native-lib-for-libsignal)
+  Those are bundled for x86_64 Linux (with recent enough glibc, see #643), for other systems/architectures see: [Provide native lib for libsignal](https://github.com/AsamK/signal-cli/wiki/Provide-native-lib-for-libsignal)
 
 ### Install system-wide on Linux
 See [latest version](https://github.com/AsamK/signal-cli/releases).