diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index 4111fbd7..f4dcb2ee 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -1618,7 +1618,7 @@ BigDecimal_divide(VALUE self, VALUE r, Real **c, Real **res, Real **div)
 /* For c = self.div(r): with round operation */
 {
     ENTER(5);
-    Real *a, *b, *d;
+    Real *a, *b;
     ssize_t a_prec, b_prec;
     size_t mx;