diff --git a/libxcrypt.spec b/libxcrypt.spec
index 8dfa17f..d58f346 100644
--- a/libxcrypt.spec
+++ b/libxcrypt.spec
@@ -155,9 +155,14 @@ fi                                          \
 %{nil}
 
 
+# Fail linking if there are undefined symbols.
+# Required for proper ELF symbol versioning support.
+%global _ld_strict_symbol_defs 1
+
+
 Name:           libxcrypt
 Version:        4.4.16
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Extended crypt library for descrypt, md5crypt, bcrypt, and others
 
 # For explicit license breakdown, see the
@@ -499,6 +504,9 @@ done
 
 
 %changelog
+* Sat Apr 25 2020 Björn Esser <besser82@fedoraproject.org> - 4.4.16-3
+- Explicitly force linking with '-Wl,-z,defs'
+
 * Fri Apr 24 2020 Björn Esser <besser82@fedoraproject.org> - 4.4.16-2
 - Move fipscheck hmac checksums to %%{_libdir}/fipscheck