diff --git a/src/common/xstring.c b/src/common/xstring.c
index 49e7594d3405f8485dc21d0efc01411c59f258da..e7acfd610f885fc9d6e3b1f8e892932ccc1c83e6 100644
--- a/src/common/xstring.c
+++ b/src/common/xstring.c
@@ -19,7 +19,7 @@
 #include <string.h>
 #include <stdio.h>
 #if 	HAVE_STRERROR_R && !HAVE_DECL_STRERROR_R
-//char *strerror_r(int, char *, int);
+char *strerror_r(int, char *, int);
 #endif
 #include <errno.h>
 #if 	HAVE_UNISTD_H