1 files changed, 1 insertions, 0 deletions
diff --git a/doc/edit-sgml.c b/doc/edit-sgml.c
index a9b89472..407dd2c2 100644
--- a/doc/edit-sgml.c
+++ b/doc/edit-sgml.c
@@ -24,6 +24,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <ctype.h>
 
 typedef enum { False, True } Bool;