diff --git a/libtoolize.in b/libtoolize.in
index 63106941..336fc81b 100644
--- a/libtoolize.in
+++ b/libtoolize.in
@@ -947,7 +947,15 @@ func_install_pkgltdl_files ()
 	  ;;
 
         config-h.in)
-          test subproject = "$ltdl_mode" || continue
+          test subproject = "$ltdl_mode" && {
+            # Always copy config-h.in, otherwise automake's autoheader rules
+            # will change the destination's timestamp if it is symlinked.
+            ( opt_copy=:
+              func_copy "$file" "$pkgltdldir" "$ltdl_dir" \
+                pkgltdl_header "$my_copy_filter"
+            )
+          }
+          continue
           ;;
 
         configure)
diff --git a/tests/libtoolize.at b/tests/libtoolize.at
index fec51c61..cbc21d68 100644
--- a/tests/libtoolize.at
+++ b/tests/libtoolize.at
@@ -471,7 +471,7 @@ libtoolize: linking file 'ltdl/README'
 libtoolize: linking file 'ltdl/configure.ac'
 libtoolize: copying file 'ltdl/aclocal.m4'
 libtoolize: linking file 'ltdl/Makefile.in'
-libtoolize: linking file 'ltdl/config-h.in'
+libtoolize: copying file 'ltdl/config-h.in'
 libtoolize: copying file 'ltdl/configure'
 libtoolize: linking file 'ltdl/libltdl/lt__alloc.h'
 libtoolize: linking file 'ltdl/libltdl/lt__argz_.h'
@@ -1047,7 +1047,7 @@ libtoolize: linking file 'ltdl/README'
 libtoolize: creating file 'ltdl/configure.ac'
 libtoolize: creating file 'ltdl/aclocal.m4'
 libtoolize: creating file 'ltdl/Makefile.in'
-libtoolize: linking file 'ltdl/config-h.in'
+libtoolize: copying file 'ltdl/config-h.in'
 libtoolize: creating file 'ltdl/configure'
 libtoolize: linking file 'ltdl/libltdl/lt__alloc.h'
 libtoolize: linking file 'ltdl/libltdl/lt__argz_.h'