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diff --git a/src/libs/zbxsysinfo/common/net.c b/src/libs/zbxsysinfo/common/net.c
index c8956a6..645fd8c 100644
--- a/src/libs/zbxsysinfo/common/net.c
+++ b/src/libs/zbxsysinfo/common/net.c
@@ -26,6 +26,39 @@
#include "net.h"
+#if defined(__UCLIBC__) && defined(HAVE_RES_QUERY)
+/*
+ * Skip over a compressed domain name. Return the size or -1.
+ */
+int
+__dn_skipname(const u_char *comp_dn, const u_char *eom)
+{
+ const u_char *cp;
+ int n;
+
+ cp = comp_dn;
+ while (cp < eom && (n = *cp++)) {
+ /*
+ * check for indirection
+ */
+ switch (n & INDIR_MASK) {
+ case 0: /* normal case, n == len */
+ cp += n;
+ continue;
+ case INDIR_MASK: /* indirection */
+ cp++;
+ break;
+ default: /* illegal type */
+ return (-1);
+ }
+ break;
+ }
+ if (cp > eom)
+ return (-1);
+ return (cp - comp_dn);
+}
+#endif
+
/*
* 0 - NOT OK
* 1 - OK
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