diff --git a/contrib/ChangeLog b/contrib/ChangeLog
index e5ccfe566d0..edcf6b74cb0 100644
--- a/contrib/ChangeLog
+++ b/contrib/ChangeLog
@@ -1,3 +1,8 @@
+2014-12-04  Thomas Preud'homme  <thomas.preudhomme@arm.com>
+
+	* check_GNU_style.sh: Warn for incorrect number of spaces in function
+	call only if 0 or 2+ spaces found.
+
 2014-12-02  Tobias Burnus  <burnus@net-b.de>
 
 	* download_prerequisites: Download ISL 0.14 instead of 0.12.2.
diff --git a/contrib/check_GNU_style.sh b/contrib/check_GNU_style.sh
index ef8fdda6ddd..5f901901306 100755
--- a/contrib/check_GNU_style.sh
+++ b/contrib/check_GNU_style.sh
@@ -113,7 +113,7 @@ g 'Sentences should end with a dot.  Dot, space, space, end of the comment.' \
     '[[:alnum:]][[:blank:]]*\*/' $*
 
 vg 'There should be exactly one space between function name and parentheses.' \
-    '\#define' '[[:alnum:]]([^[:blank:]]|[[:blank:]]{2,})\(' $*
+    '\#define' '[[:alnum:]]([[:blank:]]{2,})?\(' $*
 
 g 'There should be no space before closing parentheses.' \
     '[[:graph:]][[:blank:]]+\)' $*