--- a/support/nfsidmap/libnfsidmap.c
+++ b/support/nfsidmap/libnfsidmap.c
@@ -57,6 +57,40 @@
 #include <arpa/nameser.h>
 #include <arpa/nameser_compat.h>
 
+#ifdef __ANDROID__
+static int res_querydomain(const char *name, const char *domain, int klass, int type, unsigned char *answer, int anslen)
+{
+	static int initialized = 0;
+	static int (*libc_impl)(const char *, const char *, int, int, unsigned char *, int) = NULL;
+	if (!initialized) {
+		void *libc_handle = dlopen("libc.so", RTLD_NOW);
+		if (libc_handle != NULL)
+			libc_impl = dlsym(libc_handle, "__res_querydomain");
+		initialized = 1;
+	}
+	if (libc_impl != NULL)
+		return libc_impl(name, domain, klass, type, answer, anslen);
+	h_errno = NO_RECOVERY;
+	return -1;
+}
+
+static int dn_skipname(const unsigned char *ptr, const unsigned char *eom)
+{
+	static int initialized = 0;
+	static int (*libc_impl)(const unsigned char *, const unsigned char *) = NULL;
+	if (!initialized) {
+		void *libc_handle = dlopen("libc.so", RTLD_NOW);
+		if (libc_handle != NULL)
+			libc_impl = dlsym(libc_handle, "__dn_skipname");
+		initialized = 1;
+	}
+	if (libc_impl != NULL)
+		return libc_impl(ptr, eom);
+	errno = ENOSYS;
+	return -1;
+}
+#endif
+
 #include "nfsidmap.h"
 #include "nfsidmap_private.h"
 #include "nfsidmap_plugin.h"