diff --git a/icu.spec b/icu.spec
index 27b2516dc0f86f2f7c676c0491296e6ea92c7c8c..9561398128915225753b0a8eb32da321aa8b7e2e 100644
--- a/icu.spec
+++ b/icu.spec
@@ -1,4 +1,4 @@
-%bcond_without build_compat
+%bcond_with build_compat
 
 %if %{with build_compat}
 %define compat_version 77.1
@@ -8,7 +8,7 @@
 
 Name:      icu
 Version:   78.1
-Release:   1
+Release:   2
 Summary:   International Components for Unicode
 License:   Unicode-DFS-2016 AND BSD-2-Clause AND BSD-3-Clause AND Public Domain
 URL:       https://icu.unicode.org/
@@ -174,6 +174,9 @@ popd
 %{_mandir}/man8/*
 
 %changelog
+* Fri Oct 31 2025 Funda Wang <fundawang@yeah.net> - 78.1-2
+- do not build compat lib for icu 77
+
 * Fri Oct 31 2025 Funda Wang <fundawang@yeah.net> - 78.1-1
 - update to 78.1