diff --git a/gtkdoc-mkdb.in b/gtkdoc-mkdb.in
index 0f04eb5..4877836 100755
--- a/gtkdoc-mkdb.in
+++ b/gtkdoc-mkdb.in
@@ -3124,6 +3124,7 @@ sub GetImplementations {
 	    push (@impls, $key);
 	}
     }
+    @impls = sort @impls;
     if ($#impls >= 0) {
 	$text = <<EOF;
 <para>
-- 
1.6.6.1

