diff --git a/tcl.attr b/tcl.attr
new file mode 100644
index 0000000000000000000000000000000000000000..2d1752dd35886b1b06bb82f52a7990b31671eeff
--- /dev/null
+++ b/tcl.attr
@@ -0,0 +1,19 @@
+%__tcl_path ^(%{_datadir}|%{_libdir})/tcl[[:digit:]]+\\.[[:digit:]]+/.+
+
+%__tcl_requires() %{lua:
+    -- Match buildroot paths of the form
+    --    /PATH/OF/BUILDROOT/usr/lib(64)/tclMAJOR.MINOR/ and
+    --    /PATH/OF/BUILDROOT/usr/share/tclMAJOR.MINOR/
+    -- generating a line of the form:
+    --    tcl(abi) = MAJOR.MINOR
+    local path = rpm.expand('%1')
+    local datadir = rpm.expand('%_datadir')
+    local libdir = rpm.expand('%_libdir')
+    for i, dir in ipairs({datadir, libdir}) do
+        if path:match(dir .. '/tcl%d+%.%d+/.*') then
+            local requires = path:gsub('.*' .. dir .. '/tcl(%d+%.%d+)/.*', 'tcl(abi) = %1')
+            print(requires)
+            break
+        end
+    end
+}
diff --git a/tcl.spec b/tcl.spec
index f580b790aaa546312d015dd1cb37579cd1c79af3..35dd26a44dfc5f9210055a842c811e592c4e9027 100644
--- a/tcl.spec
+++ b/tcl.spec
@@ -2,13 +2,14 @@
 
 Name:          tcl
 Version:       8.6.16
-Release:       1
+Release:       2
 Epoch:         1
 Summary:       The Tool Command Language implementation
 License:       TCL AND GPL-3.0-or-later WITH bison-exception-2.2 AND BSD-3-Clause
 URL:           https://sourceforge.net/projects/tcl/
 Source0:       https://downloads.sourceforge.net/sourceforge/tcl/tcl-core%{version}-src.tar.gz
 Source1:       macros.tcl
+Source2:       tcl.attr
 
 BuildRequires: autoconf zlib-devel systemtap-sdt-devel gcc
 Provides:      tcl(abi) = %{MAJOR}
@@ -90,6 +91,7 @@ sed -i -e "s|$PWD/unix|%{_libdir}|; s|$PWD|%{_includedir}/%{name}-private|" %{bu
 rm -rf %{buildroot}/%{_datadir}/%{name}%{MAJOR}/ldAix
 
 install -D -m644 %{S:1} %{buildroot}%{_rpmmacrodir}/macros.tcl
+install -D -m644 %{S:2} %{buildroot}%{_fileattrsdir}/tcl.attr
 
 %check
 pushd unix
@@ -106,6 +108,7 @@ popd
 %{_libdir}/lib%{name}%{MAJOR}.so
 %exclude %{_datadir}/%{name}%{MAJOR}/tclAppInit.c
 %{_rpmmacrodir}/macros.tcl
+%{_fileattrsdir}/tcl.attr
 
 %files devel
 %{_includedir}/*
@@ -121,6 +124,9 @@ popd
 %{_mandir}/man?/*
 
 %changelog
+* Sat Aug 02 2025 Funda Wang <fundawang@yeah.net> - 1:8.6.16-2
+- add tcl.attr to generate 'tcl(abi)' requires automatically
+
 * Wed Dec 25 2024 Funda Wang <fundawang@yeah.net> - 1:8.6.16-1
 - update to 8.6.16