diff --git a/crypto/sm9/sm9_sign.c b/crypto/sm9/sm9_sign.c
index a9466256..cd901ab1 100755
--- a/crypto/sm9/sm9_sign.c
+++ b/crypto/sm9/sm9_sign.c
@@ -198,6 +198,8 @@ end:
 	BN_free(r);
 	point_cleanup(&Ppubs);
 	fp12_cleanup(w);
+	BN_CTX_end(bn_ctx);
+	BN_CTX_free(bn_ctx);
 	return ret;
 }
 
@@ -355,9 +357,7 @@ end:
 	point_cleanup(&P);
 	fp12_cleanup(w);
 	fp12_cleanup(u);
-	if (bn_ctx) {
-		BN_CTX_end(bn_ctx);
-	}
+	BN_CTX_end(bn_ctx);
 	BN_CTX_free(bn_ctx);
 	return ret;
 }