diff --git a/obs-service-format_spec_file.changes b/obs-service-format_spec_file.changes
index 13f009c..659657f 100644
--- a/obs-service-format_spec_file.changes
+++ b/obs-service-format_spec_file.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Feb 27 13:12:13 UTC 2012 - saschpe@suse.de
+
+- avoid breaking shell expansions
+
 -------------------------------------------------------------------
 Fri Feb 24 09:48:57 UTC 2012 - coolo@suse.com
 
diff --git a/prepare_spec b/prepare_spec
index 0630f3d..5bd203e 100644
--- a/prepare_spec
+++ b/prepare_spec
@@ -320,7 +320,7 @@ sub read_and_parse_old_spec {
       }
 
       my %aa;
-      while ($cur_tag =~ m{([^,\s]+(\s*[<=>]+\s*[^,\s]+)?)}g) {
+      while ($cur_tag =~ m{([^,\s]+(\s*[<=>]+\s*(?:\%\(.*\)|[^,\s]+))?)}g) {
 	$aa{$1}=1;
       }
       # ignore line if it looks like a "usedforbuild" line, i.e.