diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index a79fd4783..da7671cd8 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,8 @@
+2014-11-20  Sebastian Huber  <sebastian.huber@embedded-brains.de>
+
+	* libc/sys/rtems/sys/syslimits.h (NGROUPS_MAX): Adjust value so
+	that NGROUPS is even.
+
 2014-11-12  Jon Beniston  <jon@beniston.com>
 
 	* libc/stdlib/strtod.c (sulp): Cast to int32_t to avoid overflow.
diff --git a/newlib/libc/sys/rtems/sys/syslimits.h b/newlib/libc/sys/rtems/sys/syslimits.h
index 74c4dd273..2295afe34 100644
--- a/newlib/libc/sys/rtems/sys/syslimits.h
+++ b/newlib/libc/sys/rtems/sys/syslimits.h
@@ -45,7 +45,7 @@
 #define	MAX_CANON		  255	/* max bytes in term canon input line */
 #define	MAX_INPUT		  255	/* max bytes in terminal input */
 #define	NAME_MAX		  255	/* max bytes in a file name */
-#define	NGROUPS_MAX		   16	/* max supplemental group id's */
+#define	NGROUPS_MAX		   15	/* max supplemental group id's */
 #ifndef OPEN_MAX
 #define	OPEN_MAX		   64	/* max open files per process */
 #endif