--- Libc/Libc-498.1.7/arm/string/Makefile.inc
+++ Libc/Libc-583/arm/string/Makefile.inc
@@ -11,4 +11,8 @@
 	strcmp.s \
 	strlen.s
 
+.if defined(FEATURE_ARM_ARCH_6)
+MDSRCS += memset_pattern.s
+.endif
+
 SUPPRESSSRCS += memcpy.c memmove.c memset.c strlen.c