1 files changed, 1 insertions, 1 deletions
diff --git a/src/zmul.c b/src/zmul.c
index 6023664..c2cca10 100644
--- a/src/zmul.c
+++ b/src/zmul.c
@@ -22,7 +22,7 @@ zmul(z_t a, z_t b, z_t c)
 	b_sign = zsignum(b);
 	c_sign = zsignum(c);
 
-	if (!b_sign || !c_sign) {
+	if (EXPECT(!b_sign || !c_sign, 0)) {
 		SET_SIGNUM(a, 0);
 		return;
 	}