--- btparse/tests/macro_test.c
+++ btparse/tests/macro_test.c	2012-05-21 10:47:27.814065639 +0000
@@ -20,6 +20,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <ctype.h>
+#include <string.h>
 #include "btparse.h"
 
 
--- btparse/tests/name_test.c
+++ btparse/tests/name_test.c	2012-05-21 10:49:45.735969107 +0000
@@ -8,6 +8,7 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include "btparse.h"
 
 
--- btparse/tests/postprocess_test.c
+++ btparse/tests/postprocess_test.c	2012-05-21 10:50:31.422565344 +0000
@@ -1,5 +1,6 @@
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include "my_dmalloc.h"
 #include "btparse.h"
 
--- btparse/tests/purify_test.c
+++ btparse/tests/purify_test.c	2012-05-21 10:51:00.338566578 +0000
@@ -2,6 +2,7 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include "btparse.h"
 
 int
--- btparse/tests/tex_test.c
+++ btparse/tests/tex_test.c	2012-05-21 10:51:23.218565419 +0000
@@ -2,6 +2,7 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include "btparse.h"
 
 void main (void)