diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 6d27102a8d7..5b5847e9462 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2016-10-10  Georg-Johann Lay  <avr@gjlay.de>
+
+	* config/avr/gen-avr-mmcu-texi.c (string.h): Include.
+
 2016-10-10  Andreas Schwab  <schwab@suse.de>
 
 	PR target/77738
diff --git a/gcc/config/avr/gen-avr-mmcu-texi.c b/gcc/config/avr/gen-avr-mmcu-texi.c
index 8b2ef846051..f7a757998f1 100644
--- a/gcc/config/avr/gen-avr-mmcu-texi.c
+++ b/gcc/config/avr/gen-avr-mmcu-texi.c
@@ -19,6 +19,7 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 
 #define IN_GEN_AVR_MMCU_TEXI