diff --git a/library/stdlib_lldiv.c b/library/stdlib_lldiv.c
index 3714f84..ba5dbbf 100644
--- a/library/stdlib_lldiv.c
+++ b/library/stdlib_lldiv.c
@@ -37,6 +37,10 @@
 
 /****************************************************************************/
 
+#if defined(__GNUC__) || (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L))
+
+/****************************************************************************/
+
 lldiv_t
 lldiv(long long n,long long d)
 {
@@ -49,3 +53,7 @@ lldiv(long long n,long long d)
 
 	return(result);
 }
+
+/****************************************************************************/
+
+#endif