diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index a67a49acf..1cdb47b6a 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+2006-08-29  Paul Brook  <paul@codesourcery.com>
+
+	* libc/include/sys/config.h: Define _REENT_SMALL for Thumb-2.
+
 2006-08-27  Joel Sherrill <joel.sherrill@OARcorp.com>
 
 	* libc/sys/rtems/machine/sys/param.h: Conditionalize definition of
diff --git a/newlib/libc/include/sys/config.h b/newlib/libc/include/sys/config.h
index dc6264333..1f3c3e03d 100644
--- a/newlib/libc/include/sys/config.h
+++ b/newlib/libc/include/sys/config.h
@@ -125,6 +125,10 @@
 #define _REENT_SMALL
 #endif /* __m32c__ */
 
+#ifdef __thumb2__
+/* Thumb-2 based ARMv7M devices are really small.  */
+#define _REENT_SMALL
+#endif
 
 #ifdef __SPU__
 #define MALLOC_ALIGNMENT 16