diff --git a/testsuite/rcconf01/test_main.c b/testsuite/rcconf01/test_main.c
index df1b35fc..8f1cf2f2 100644
--- a/testsuite/rcconf01/test_main.c
+++ b/testsuite/rcconf01/test_main.c
@@ -27,6 +27,7 @@
 
 #include <assert.h>
 #include <errno.h>
+#include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/stat.h>