diff --git a/master.cfg b/master.cfg
index 3f67f68..43ae7d3 100644
--- a/master.cfg
+++ b/master.cfg
@@ -687,20 +687,30 @@ class RunTestGDBIndexBuildBSD (RunTestGDBIndexBuild, RunTestGDBBSD_Common):
     """Testing with the "cc-with-tweaks.sh" passing -i.  FIXME: include bitness here."""
     pass
 
-# For now, we only support testing the "master" branch.
+# All branches that are going to be watched.
 all_gdb_filter = ChangeFilter (branch_fn = should_watch_branch)
 
 def DefaultGDBCanStartBuild (builder, buildslave, buildrequest):
     return not builder.building
 
-files_ignored_re = re.compile ("(cpu/|elfcpp/|gas/|gold/|gprof/|ld/|texinfo/).*")
+files_ignored_re = re.compile ("(cpu/|elfcpp/|gas/|gold/|gprof/|ld/|texinfo/|gdb/doc/).*")
 
 def DefaultGDBfileIsImportant (change):
     """Implementation of fileIsImportant method, in order to decide which
 changes to build on GDB."""
+    only_changelog = True
+
     if 'GDB Administrator' in change.who:
         return False
 
+    # Filter out commits that only modify the ChangeLog files.
+    for filename in change.files:
+        if 'ChangeLog' not in filename:
+            only_changelog = False
+
+    if only_changelog:
+        return False
+
     for filename in change.files:
         if not re.match (files_ignored_re, filename):
             return True