diff --git a/lib/string.h.in b/lib/string.h.in
index 9e8fba91d..bbdaeb43e 100644
--- a/lib/string.h.in
+++ b/lib/string.h.in
@@ -35,6 +35,7 @@
 #define strtok_r strtok_s
 #define strcasecmp _stricmp
 #define strncasecmp _strnicmp
+#define strerror_r(errnum, buf, buflen) strerror_s(buf, buflen, errnum)
 #endif
 
 #ifndef HAVE_STRNLEN